BEGIN:VCALENDAR VERSION:2.0 PRODID:-//SNS Events//1.0 CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Astrophysics: Institute for Advanced Study, Princeton University X-WR-CALDESC:Astrophysics: Institute for Advanced Study, Princeton University BEGIN:VEVENT UID:1294678800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110110T170000Z DTEND:20110110T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129468510013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110110T184500Z DTEND:20110110T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "The Nature of Damped Lyman Alpha Systems" (Renyue Cen - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. LOCATION:Princeton University, Peyton Hall, Dome Room - NOTE DIFFERENT ROOM COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1295283600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110117T170000Z DTEND:20110117T180000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1295283600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110117T170000Z DTEND:20110117T180000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Testing Dark Energy Using the Growth of Large Scale Structure in the Universe" (Elise Jennings, University of Durham) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129528990013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110117T184500Z DTEND:20110117T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Planck Early Results" (Doug Richstone - Discussion Leader, Institute for Advanced Study / University of Michigan) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. TOPIC: Planck Early Results Paper 8: The all-sky early S-Z cluster sample. Here is the link:http://arxiv.org/abs/1101.2024 . The whole set of papers is too much to read, but for reference it is here:http://www.sciops.esa.int/index.php?project=planck&page=Planck_Published_Papers . As I was looking at Paper 8 I found myself also looking at paper 1 on the mission and Paper 10 on the Statistical Analysis of scaling relations. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1101.2024 END:VEVENT BEGIN:VEVENT UID:12954582001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110119T173000Z DTEND:20110119T183000Z SUMMARY:Princeton University Wunch Talk, "New Puzzles in Supermassive Black Hole Evolution" (Charles Steinhardt, Institute for the Physics and Mathematics of the Universe) DESCRIPTION:ABSTRACT: The standard model of cosmology has been remarkably successful in explaining the detailed evolution of galaxies and large-scale structure beginning from primordial density perturbations. Supermassive black holes, however, seem to present a more difficult challenge. The standard cosmological model, as currently understood, cannot explain how supermassive black holes are born, how they grow, and why or how they die. This talk will present a novel approach for analyzing data from quasar surveys that reveals new information about the luminosity and evolution of black holes. Instead of resolving these problems, the results suggest even deeper puzzles that may require new ideas in astrophysics or fundamental physics to resolve. LOCATION:Peyton Hall, Room 33 (Old Tea Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1295888400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110124T170000Z DTEND:20110124T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Discussion of Early Planck Papers" (Bill Jones and Cynthia Chiang, Discussion Leaders, Princeton University) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12958947006f815bd9dc0a65fcb65df74f0dea814e@sns.ias.edu DTSTART:20110124T184500Z DTEND:20110124T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - LOCATION CHANGE, "The Gas Content of Void Galaxies" (Kathryn Kreckel, Columbia University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. LOCATION:Princeton University, Peyton Hall, Dome Room (NOTE LOCATION) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12960630001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110126T173000Z DTEND:20110126T183000Z SUMMARY:Princeton University Wunch Talk, "Non-ideal MHD Effects in Protoplanetary Disks" (Xuening Bai, Princeton University) DESCRIPTION:ABSTRACT: The structure and evolution of the protoplanetary disks (PPDs) largely depend on the process of angular momentum transport, for which MHD turbulence driven by the magnetorotational instability (MRI) has been considered as the most promising mechanism. Due to the weak ionization level in PPDs, non-ideal MHD effects such as Ohmic resistivity, Hall effect and ambipolar diffusion (AD) play a significant role. Most MRI calculations for PPDs done so far include only the Ohmic resistivity, and reveal that the MRI operates mainly in the surface layer and the outer regions of the PPDs. However, Hall and AD effects dominate in such regions but remain poorly explored. We perform 3D unstratified shearing-box MRI simulations with AD using a variety of magnetic configurations and AD coefficients. We find that angular momentum transport becomes inefficient when the ion-neutral collision frequency falls below the orbital frequency. Moreover, sustained MRI turbulence requires weak magnetic field in the AD dominated regime. These constraints combined together indicate that MRI alone has difficulty in accounting for the accretion rate in a large fraction of T-Tauri stars, while angular momentum transport by magnetized wind may be a viable solution. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12962304004c37602dc38e720a25e30741fd56d2e7@sns.ias.edu DTSTART:20110128T160000Z DTEND:20110128T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - NOTE NEW DATE AND TIME, "The Co-Evolution of Galaxies and Black Holes" (Kevin Schawinski, Yale University) DESCRIPTION:ABSTRACT: How, why and when are the scaling relationships between black holes set? Do accreting black holes really regulate the evolution of their host galaxies? What physical mechanisms underly feedback? I will discuss some recent results made possible with data from the Sloan Digital Sky Survey, the Hubble Space Telescope and the citizen scientists taking part in the Galaxy Zoo. I will show how host galaxy morphology is a key parameter in co-evolution scenarios and that the nearest quasar to us underwent a dramatic shutdown in the very recent past. Finally, I will present some very recent observational work on black hole growth in the very early Universe (z>6). LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296234000d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110128T170000Z DTEND:20110128T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (BingKan Xue, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12962340006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110128T170000Z DTEND:20110128T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129623400019663aae3328ab332e55083c8e1f7457@sns.ias.edu DTSTART:20110128T170000Z DTEND:20110128T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 - TITLE ADDED, "Early SZ Results from Planck" (Alexandra Rahlin, Princeton University) DESCRIPTION:ABSTRACT: I will discuss the recently released Sunyaev-Zeldovich cluster catalogue, including comparisons of the measured SZ parameters to x-ray and optical predictions. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296493200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110131T170000Z DTEND:20110131T180000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296493200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110131T170000Z DTEND:20110131T180000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129649950013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110131T184500Z DTEND:20110131T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Evolution of the UV Background at High Redshift" (Andrei Mesinger - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Andrei Mesinger is leading the discussion on the evolution of the UV background at high redshift. Here are the papers: http://adsabs.harvard.edu/abs/2010arXiv1011.5850C and http://adsabs.harvard.edu/abs/2011arXiv1101.1964M . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://adsabs.harvard.edu/abs/2010arXiv1011.5850C END:VEVENT BEGIN:VEVENT UID:129657600081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110201T160000Z DTEND:20110201T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Cosmology and Astrophysics in the Planck Era" (Bill Jones, Princeton University) DESCRIPTION:ABSTRACT: We will discuss the first astrophysical results from the Planck spacecraft, and prospects for cosmology with Planck and sub-orbital CMB polarimeters. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296581400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110201T173000Z DTEND:20110201T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296595800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110201T213000Z DTEND:20110201T223000Z SUMMARY:Princeton University Astronomy Colloquium, "21cm Cosmology: Probing the Epoch of Reionization" (Aaron Parsons, University of California, Berkeley) DESCRIPTION:ABSTRACT: The Epoch of Reionization (EoR) -- the rapid ionization of the majority of the hydrogen in the universe by the light of the first stars and supermassive black holes -- is perhaps the last major phase transition of our universe that remains unexplored. First-generation experiments aiming to measure the 3-dimensional power spectrum ofreionization fluctuations via redshifted 21cm emission are currently underway. While calibration, foreground removal, and obtaining the requisite sensitivity are all challenging aspects of these efforts, early results suggest that there may imminently be a detection that significantly impacts our understanding of the dominant processes at work during this era.I will discuss current prospects for detecting the 21cm EoR signal in the context of our recent progress with 16- and 32-antenna deployments of the Precision Array for Probing the Epoch of Reionziation (PAPER) in Green Bank, West Virginia, and the Karoo Desert of South Africa. I will also discuss a novel technique for accessing the 3-dimensionalpower spectrum of reionization, and the impacts of systematics and foregrounds on recent measurements. Finally, I will present our current plans for the Hydrogen Epoch of Reionization Array (HERA) that will supersede all current efforts and enable the direct imaging of reionization structures. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129666780071cb4cbbe49289150c63388813ce62b9@sns.ias.edu DTSTART:20110202T173000Z DTEND:20110202T183000Z SUMMARY:Princeton University Wunch Talk - RESCHEDULE TO FEBRUARY 4 - NOON DESCRIPTION:NOTICE: The 12:30 talk by Rachel Mandelbaum scheduled today at Princeton University has been postponed, because of the weather; it will be rescheduled for Friday at noon, also in Room 33 in Peyton Hall. LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296750600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110203T163000Z DTEND:20110203T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Primordial Non-Gaussianity and Large-Scale Structure" (Roman Scoccimarro, New York University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12967686005caebee28c8a04279c9c1e8f27e5fd1d@sns.ias.edu DTSTART:20110203T213000Z DTEND:20110203T223000Z SUMMARY:Princeton University Special Astrophysics Talk - ADDED, "Searching for Planets with HATS" (Gaspar Bakos, Harvard-Center for Astrophysics) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296838800d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110204T170000Z DTEND:20110204T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Fethi Ramazanoglou, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:12968388006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110204T170000Z DTEND:20110204T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Alexandra Rahlin, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:129683880019663aae3328ab332e55083c8e1f7457@sns.ias.edu DTSTART:20110204T170000Z DTEND:20110204T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 - TITLE ADDED, "Beam Systematics for CMB Polarimetry" (Tom Essinger-Hileman, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: Current and upcoming CMB polarization experiments are searching for the faint imprint of inflationary gravitational waves in the CMB polarization. This odd-parity 'B-mode' signal is many orders of magnitude down from the CMB temperature anisotropies and at least an order of magnitude lower than the even-parity `E-mode' polarization. I will review the effects of beam asymmetries on our ability to recover the B-mode signal on top of this large background and discuss the ability of polarization modulation techniques to mitigate these beam systematics. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:12968388001741fe7cc4ddfc4589ad23a2d0a42a18@sns.ias.edu DTSTART:20110204T170000Z DTEND:20110204T180000Z SUMMARY:Princeton University Wunch Talk - NEW DATE AND TIME!, "Current and Future Galaxy Formation and Cosmology Results with Wide-field Imaging Surveys" (Rachel Mandelbaum, Princeton University) DESCRIPTION:NOTE: This talk was rescheduled from February 2 to today. Abstract: Gravitational lensing is a convenient tool for observing the total matter content of the universe, including dark matter. Given the strong observational support for the claim that most of the matter in the universe is dark, lensing is a critical part of current and future observational efforts in galaxy formation and cosmology. In this talk, I will discuss several ways that lensing, combined with other probes of large-scale structure, may be used to constrain cosmological model parameters, while also learning about the galaxy population used for the study. I will then present two specific examples from recently completed and ongoing studies that serve as a proof of concept for these methods using the Sloan Digital Sky Survey (SDSS), including some very new cosmology constraints, and will discuss lessons learned about the power of these methods for upcoming surveys such as Hyper-SuprimeCam (HSC) and LSST. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1296842400da863d0d8e3d9e851311d6350956f78d@sns.ias.edu DTSTART:20110204T180000Z DTEND:20110204T190000Z SUMMARY:Princeton University Special Astroplasmas Seminar - ADDED, "Inflow Density Influence on Magnetic Reconnection" (Penny Wu, University of Delaware) DESCRIPTION:NOTE: This talk was rescheduled from last week. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12970998001e8ebdd07a1509c262020f8110e0c75a@sns.ias.edu DTSTART:20110207T173000Z DTEND:20110207T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - NOTE NEW START TIME!, "A Brachistochrone Approach to Reconstruct the Inflaton Potential" (Jiajun Xu, University of Wisconsin-Madison) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: Abstract: We propose a new way to implement an inflationary prior to a cosmological dataset that incorporates the inflationary observables at arbitrary order. This approach employs an exponential form for the Hubble parameter without taking the slow-roll approximation. At lowest non-trivial order, it has the unique property that it is the solution to the brachistochrone problem for inflation. We show how this approach can lead to reconstruction of the inflaton potential from observational data. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297104300a4f13b51a9e1ae1529301e39bc82ed75@sns.ias.edu DTSTART:20110207T184500Z DTEND:20110207T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - SECOND PAPER ADDED, "Reionization and Feedback" (Stephanie Tonnesen, Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. The first paper to be discussed is "The ACS LCID project. V. The Star Formation History of the Dwarf Galaxy LGS-3: Clues for Cosmic Reionization and Feedback" and the link is : http://xxx.lanl.gov/abs/1101.5762 . The second paper is "Formation of isolated dwarf galaxies with feedback" and the link is: http://adsabs.harvard.edu/abs/2010MNRAS.402.1599S . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://xxx.lanl.gov/abs/1101.5762 END:VEVENT BEGIN:VEVENT UID:129718080081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110208T160000Z DTEND:20110208T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Astrophysics of Supermassive Black Hole Formation" (Tom Abel, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, SLAC National Accelerator Lab) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297186200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110208T173000Z DTEND:20110208T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297200600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110208T213000Z DTEND:20110208T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Clumpy Galaxies in the Early Universe" (Debra Elmegreen, Vassar College) DESCRIPTION:Abstract: Photometric studies of 1000 large galaxies out to redshift z=5, imaged by the Hubble Space Telescope in the Ultra Deep Field, reveal details of galaxy evolution. These distances probe ages less than 2 billion years after the Big Bang. In addition to spirals and ellipticals, galaxies in the early Universe include unusual morphologies not seen locally, such as chains, clump clusters, and tadpoles. These clumpy galaxies contain star-forming regions nearly 100 million times the mass of our sun, much more massive than star-forming complexes in nearby galaxies. Observations and numerical simulations will be discussed in the context of how these clumpy galaxies transform into the familiar local systems. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129726360089c324eaf930f731320da183c9fac123@sns.ias.edu DTSTART:20110209T150000Z DTEND:20110209T160000Z SUMMARY:Princeton University Special Astrophysics Talk, "Near-Field Cosmology with the Oldest, Most Metal-Poor Stars" (Anna Frebel, Harvard-Smithsonian Center for Astrophysics, Harvard University) DESCRIPTION:ABSTRACT: One of the most important topics in modern astrophysics is understanding the formation and evolution of stars and galaxies. Recent works on the oldest, most metal-poor stars in the Galactic halo and satellite dwarf galaxies have shown that these and many topics, ranging from nuclear astrophysics to cosmology, can be studied with stellar chemical abundances ("stellar archaeology"). Iwill present plans to overcome current bottlenecks in the field: Through the discovery and analysis of new metal-poor stars, theoretical modeling of early Universe science can be significantly constrained. In particular, any primitive objects with [Fe/H]<-4.0 will provide missing critical information on the details of element nucleosynthesis that started the chemical evolution of theUniverse. Knowing the details of the chemical evolution of faint dwarf galaxies will enable us to investigate the link between halo and dwarf galaxy stars to find out whether those old halo stars once came from earlier, analogous galaxies ("dwarf archaeology"). Finally, based onresults from state-of-the-art LCDM cosmological simulations, the chemical nature of the first galaxies can be established for an understanding of their relation to the surviving dwarfs, and the "building blocks" of the Milky Way's halo ("near-field cosmology"). To achieve these goals it is essential to produce cosmologicallymotivated abundance interpretations by combining the necessary observational and theoretical ingredients for a comprehensive study of the Milky Way's halo and its metal-poor constituents. This provides prime motivation and stepping stones for the development of concrete,testable ideas about early Universe science that will be addressed with theoretical modeling over the next decade. This unique "hybrid" approach will significantly advance the fields of galaxy formation and the early Universe by closely connecting stellar archaeology with the respective theoretical subfields for a "whole that is greater than the sum of its parts". LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12972726001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110209T173000Z DTEND:20110209T183000Z SUMMARY:Princeton University Wunch Talk, "Exoplanetary Science: Instrumentation, Observations, and Expectations" (Mike McElwain, Princeton University and Goddard Space Flight Center) DESCRIPTION:ABSTRACT: More than 500 exoplanets have been discovered and studied using indirect techniques, leading our field into the exciting new era of comparativeexoplanetology. However, the direct detection of exoplanetary systems still remains at the sensitivity limits of both ground- and space-based observatories. The development of new technologies for adaptive optics systems and high contrast instruments continues to increase the ability to directly study exoplanets. The scientific impact of these developments has promising prospects for both short and long timescales. In my talk, I will discuss recent highlights from the SEEDS survey and the current instrumentation in use at the Subaru telescope. SEEDS is a high contrast imaging strategic observing program with 120 nights of time allocated at the NAOJ's flagship optical and infrared telescope. I will also describe new instrumentation I designed to improve the SEEDS capabilities and efficiency. Finally, I will briefly discuss the conceptual design of a transiting planet camera to fly as a potential second generation instrument on-board NASA's SOFIA observatory. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297355400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110210T163000Z DTEND:20110210T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Planetary Systems from Kepler" (Daniel Fabrycky, University of California, Santa Cruz) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12973734008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110210T213000Z DTEND:20110210T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Computer Vision and Optics in the Study of Fine Art" (David Stork, Ricoh Innovations) DESCRIPTION:ABSTRACT: New rigorous computer algorithms have been used to shed light on a number of problems and controversies in the history and interpretation of fine art. Rigorous illumination estimation and shape-from-shading methods can reveal in new ways the accuracy and theworking methods of masters such as Jan van Eyck, Georges de la Tour and Caravaggio. Computer methods can dewarp the images depicted in convex mirrors depicted in paintings such as Johannes van Eyck's Arnolfini portrait and Parmigianino's Self portraitin a convex mirror to reveal new views into artists' studios and shed light on their working methods. Sophisticated computer graphics recreations of tableaus, including thescattering properties of depicted surfaces, allow us to explore "what if" scenarios and reveal for the first time the working methods of masters such as Caravaggio. What can computers reveal about images that even the best-trained connoisseurs, art historians and artist cannot? In short, how is the "hard humanities" field of computer image analysis of art changing our understanding of paintings and drawings? This stunning, profusely illustrated lecture for physical scientists will include works by Jan van Eyck, Parmigianino, Lorenzo Lotto, Georges de la Tour, Caravaggio, Hans Memling, Leonardo, and several others. You will never see paintings the same way again. LOCATION:Jadwin Hall, Room A10 COMMENT:Tea in 218 Jadwin Hall at 4 p.m. URL: END:VEVENT BEGIN:VEVENT UID:1297443600d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110211T170000Z DTEND:20110211T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Katerina Visnjic, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12974436006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110211T170000Z DTEND:20110211T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12974436009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110211T170000Z DTEND:20110211T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Graviton Non-gaussianities During Inflation" (Guilherme Pimentel, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: I will describe work in progress (w/ Juan Maldacena) on trying to classify all possible 3-point functions of gravitons during inflation. Assuming that we have exact deSitter symmetry during inflation, we can write down all possible terms in an effective field theory that would give rise to different shapes of the 3-point function. These are nicely written in terms of spinor helicity variables, which I plan to briefly review in the talk. If time permits I will make a comment on deviations from these shapes when one includes the inflaton breaking the deSitter symmetry of spacetime during inflation. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1297445400199393520edd53587651b79f54c53e65@sns.ias.edu DTSTART:20110211T173000Z DTEND:20110211T183000Z SUMMARY:Princeton University Special Astroplasmas Seminar, "The Spectral Slope of MHD Turbulence" (Andrey Beresnyak, Los Alamos National Laboratory) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129745800089c324eaf930f731320da183c9fac123@sns.ias.edu DTSTART:20110211T210000Z DTEND:20110211T220000Z SUMMARY:Princeton University Special Astrophysics Talk, "Thinking Outside the Grid" (Joe Hennawi, Max-Planck Institute for Astronomy (Heidelberg)) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297702800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110214T170000Z DTEND:20110214T180000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297703700ddec39250446bf1e54f4da32d6a4cfa8@sns.ias.edu DTSTART:20110214T171500Z DTEND:20110214T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - NOTE START NEW START TIME!, "Gravitational Lensing by Compact Objects in the Galactic Center: The Evidence for a Boson Star" (Amitai Bin-Nun, University of Pennsylvania) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT:This start is now 12:15 pm. URL: END:VEVENT BEGIN:VEVENT UID:1297707300ded1cbb92947414128438fd1021cdb1a@sns.ias.edu DTSTART:20110214T181500Z DTEND:20110214T191500Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Seminar, "Variations on a Theme of Aharonov and Bohm" (Sir Michael Berry, University of Bristol) DESCRIPTION:The Princeton Center for Theoretical Science, with support from D.E. Shaw & Co., has established a new annual visiting lectureship series that will bring each year an outstanding theoretical scientist to campus for a series of public lectures, seminars and informal discussions. Theinaugural PCTS Visiting Lecturer will be Sir Michael Berry (University of Bristol), who will be giving the Hamilton Lecture in Physics (Thursday, February 17th, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. ABSTRACT: The partial anticipation of the AB effect by Ehrenberg and Siday was an approximation whose wavefunction was not singlevalued; its connection with the singlevalued AB wave involves topology: whirling waves winding round the flux. AB is a fine illustration of idealization in physics. There are four AB effects, depending on whether the waves and the flux are classical or quantum; in the classical-classical case, fine details of the AB wavefunction have been explored experimentally in ripples scattered by a bathtub vortex. The AB wave possesses a phase singularity, and there is a similar phenomenon in general interferometers. There are connections between the AB wave and the Cornu spiral describing edge diffraction. For bound systems, the interplay of AB and geometric phases exemplifies general aspects of degeneracies induced by varying parameters. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/berry/berry.html END:VEVENT BEGIN:VEVENT UID:12977109003261313e33f6ef78b6fc75a7e891ab05@sns.ias.edu DTSTART:20110214T191500Z DTEND:20110214T201500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - TIME CHANGED, "Black Hole-stellar Mass Relation Evolution with Redshift" (Claire Lackner, Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. The papers to be discussed are: 1) "The Relation between Black Hole Mass and Host Spheroid Stellar Mass out to z~2." by Vardha Nicola Bennert at link: http://arxiv.org/abzs/1102.1975 . 2) "The Building Up of the Black Hole Mass - Stellar Mass Relation." by Alessandra Lamastra at link: http://arxiv.org/abs/1001.5407 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT:TIME CHANGED TO 2:15 PM. URL:http://arxiv.org/abzs/1102.1975 END:VEVENT BEGIN:VEVENT UID:129778560081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110215T160000Z DTEND:20110215T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Morphologies and Outflow Kinematics of Star Formation Quenching" (Alison Coil, Center for Astrophysics and Space Sciences (CASS), University of California, San Diego) DESCRIPTION:ABSTRACT: Since z=1 the number of quiescent, non-star forming galaxies in the Universe has roughly doubled. In order to constrain the star formation quenching mechanism, I will present results on the clustering properties, morphologies, and feedback associated with outflowing winds in galaxies at z~0.7 that are having their star formation quenched. I will also briefly present a new survey called PRIMUS, the largest faint galaxy redshift survey taken to date. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297791000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110215T173000Z DTEND:20110215T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297805400c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110215T213000Z DTEND:20110215T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Electromagnetic Counterparts of Spacetime Sirens" (Kristen Menou, Columbia University) DESCRIPTION:ABSTRAT; The gravitational observatory LISA will detect radiation from massive black hole sources at cosmological distances, accurately measure their luminosity distance and help identify the electromagnetic counterparts that such sources may generate. I will describe various astrophysical scenarios for the generation of electromagnetic counterparts and discuss observational strategies aimed at identifying them. Successful identifications will enable novel studies of black hole astrophysics and cosmological physics. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1297876500dbabe13e0c34dd54f98d87a682c6b875@sns.ias.edu DTSTART:20110216T171500Z DTEND:20110216T181500Z SUMMARY:Princeton University Wunch Talk - NOTE TIME CHANGE!, "CMDs and CDM: Galaxy evolution in the near field with the Pan-Andromeda Archaeological Survey" (Alan McConnachie, National Research Council (NRC) Herzberg Institute of Astrophysics, Victoria, British Columbia, Canada) DESCRIPTION:ABSTRACT: It is on galactic scales that our understanding of the cosmological evolution of matter is most incomplete. Many of the predicted features of galaxies, such as faint satellites and diffuse stellar haloes, are extremely low surface brightness, and so the Milky Way, M31 and M33 are some of the only large galaxies in the Universe and that can provide robust tests of many fundamental aspects of galaxy formation models. The Pan-Andromeda Archaeological Survey (PAndAS) is a large, deep, photometric survey that has surveyed nearly 400 sq.degrees in the surroundings of the M31/M33 sub-group, and which is providing the deepest and most complete panorama of galaxy haloes available. This survey has revealed copious stellar streams and substructures, most notable of which is a giant distortion surrounding M33 which helps constrain the orbital history of the Local Group. Large numbers of new dwarf galaxies have been discovered, allowing the derivation of the luminosity function for an entire satellite system to faint magnitudes, and new discoveries of outer halo globular clusters are providing unexpected handles on the accretion history of our nearest galactic neighbor. Here, I will review recent results from PAndAS, and discuss the future development of this field with an eye on the next generation of astronomical facilities. LOCATION:Peyton Hall, Room 33 (basement) COMMENT:The start time has been changed to 12:15! URL: END:VEVENT BEGIN:VEVENT UID:1297960200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110217T163000Z DTEND:20110217T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "First Results from the Palomar Transient Factory" (Eran Ofek, California Institute of Technology) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12979638002b66dc7c618e054f5c59b58ac618a29e@sns.ias.edu DTSTART:20110217T173000Z DTEND:20110217T183000Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Informal Lunch Talk, "Polarization Fingerprints in the Clear Blue Sky" (Sir Michael Berry, University of Bristol) DESCRIPTION:Bring your own lunch! The Princeton Center for Theoretical Science, with support from D.E. Shaw & Co., has established a new annual visiting lectureship series that will bring each year an outstanding theoretical scientist to campus for a series of public lectures, seminars and informal discussions. The inaugural PCTS Visiting Lecturer will be Sir Michael Berry (University of Bristol), who will be giving the Hamilton Lecture in Physics (Thursday, February 17th, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. ABSTRACT: Daylight is polarized, the strength being greatest at points in the sky at right angles to the sun, and zero at four points: above and below the sun and anti-sun. The zero-polarization points are fingerprint singularities, around which the polarization direction makes a half-turn (rudimentary geometric phase). Using elementary singularity theory, the polarization pattern across the whole sky can be described in a way that fits recent observations with an accuracy comparable to that of conventional elaborate multiple-scattering calculations. This recent work is a contribution to a story that started in 1817 and has been central to our understanding of polarized light, and has helped to to understand a conjecture about Viking navigation. It exposes a more general unsolved (and largely unformulated) mathematical problem. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/berry/berry.html END:VEVENT BEGIN:VEVENT UID:12979908003eb4c0d6384974e3372d2c38faa6dcc1@sns.ias.edu DTSTART:20110218T010000Z DTEND:20110218T020000Z SUMMARY:Princeton University Physics Department Donald Ross Hamilton Lecture Series - NOTE LOCATION AND TIME, "Making Light of Mathematics" (Sir Michael Berry, University of Bristol) DESCRIPTION:ABSTRACT: Many 'mathematical phenomena' find application and sometimes spectacular physical illustration in the physics of light. Concepts such as fractals, catastrophe theory, knots, infinity, zero, and even when 1+1 fails to equal 2, are needed to understand rainbows, twinkling starlight, sparkling seas, oriental magic mirrors, and simple experiments on interference, polarization and focusing. The lecture is strongly visual, and its style is non-technical yet intellectual. LOCATION:McDonnell Hall, Room A02 - NOTE LOCATION COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298048400d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110218T170000Z DTEND:20110218T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (John Appel, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:12980484006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110218T170000Z DTEND:20110218T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Lucas Parker, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:12980484009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110218T170000Z DTEND:20110218T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Relative Stability of Black Hole Threshold Solutions" (Theodor Brasoveanu, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: I will present some numerical studies of the relative stability of critical solutions in problems of gravitational collapse. These strong-field, non-trivially dynamic solutions to Einstein equations, initially discovered by Matt Choptuik, arise at the threshold of black hole formation. We study the interaction between two different matter models in spherical symmetry (a boson star and a perturbing SU(2) Yang-Mills field) that exhibit the same type of threshold solution. Given the unstable nature of the critical solutions, the central question that we address is how does matter of one type behave in the presence of a critical solution of another type of matter. Preliminary results, using adaptive grid techniques to solve Einstein equations coupled to matter, indicate that the dynamics of the combined system is dominated by the scalar field. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:129829500062fe46caad23a3ba5880ec56e060afca@sns.ias.edu DTSTART:20110221T133000Z DTEND:20110221T230000Z SUMMARY:Princeton University Physics Department Planck Workshop - Day 1, "See website" (Various) DESCRIPTION:The main goal of this workshop is to bring together members of the Planck consortium who will present early results from the experiment, and members of the astrophysical community with overlapping interests who can provide context for and feedback on these results. Plenty of discussion time will be scheduled. To register for the workshop, please fill out the Registration Form.The List of Registrants is updated automatically after each submission. To register for the workshop, please fill out the Registration Form. The deadline for registration has been postponed to February 12, 2011. LOCATION:A preliminary workshop program is available on the website. COMMENT:The deadline for registration is February 12, 2011. URL:http://www.astro.princeton.edu/astroevents/planck2011/index.php END:VEVENT BEGIN:VEVENT UID:12983076001d4357d162a3eed51addc84649274fd7@sns.ias.edu DTSTART:20110221T170000Z DTEND:20110221T180000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - CANCELED DESCRIPTION:Lunch *CANCELED* so people may attend Planck workshop at Princeton University. Many *key* collaborators on recent Planck science papers will be present, so you are all highly encouraged to attend. LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298312100ded1cbb92947414128438fd1021cdb1a@sns.ias.edu DTSTART:20110221T181500Z DTEND:20110221T191500Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Seminar, "Hamilton's Diabolical Singularity" (Sir Michael Berry, University of Bristol) DESCRIPTION:The Princeton Center for Theoretical Science, with support from D.E. Shaw & Co., has established a new annual visiting lectureship series that will bring each year an outstanding theoretical scientist to campus for a series of public lectures, seminars and informal discussions. Theinaugural PCTS Visiting Lecturer will be Sir Michael Berry (University of Bristol), who will be giving the Hamilton Lecture in Physics (Thursday, February 17th, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. ABSTRACT: The transformation of a narrow beam into a hollow cone when incident along the optic axis of a biaxial crystal, predicted by Hamilton in 1832, created a sensation when observed by Lloyd soon afterwards. It was the first geometric phase, the first application of phase space, and the prototype of the conical intersections now popular in quantum chemistry and graphene. But the fine structure of the light cone contains many subtle features, slowly revealed by experiment, whose definitive explanation, involving new mathematical asymptotics, has been achieved only recently, along with definitive experimental test of the theory. Radically different phenomena, being intensively studied now, arise when chirality and absorption are incorporated in addition to biaxiality. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/berry/berry.html END:VEVENT BEGIN:VEVENT UID:129831390013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110221T184500Z DTEND:20110221T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Can SAMs Tell us Anything? Or do they just tell us Everything?" (Stephanie Tonnesen, Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. The first paper to be discussed is "Times, environments and channels of bulge formation in a LambdaCDM cosmology" and the link is: http://xxx.lanl.gov/abs/1102.3186 . The second paper is "The other side of Bulge Formation in a Lambda-CDM cosmology: Bulgeless Galaxies in the Local Universe" and the link is: http://xxx.lanl.gov/abs/1102.3188 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://xxx.lanl.gov/abs/1102.3186 END:VEVENT BEGIN:VEVENT UID:129838320060d4df5dd3aa22bd595617f728344ef7@sns.ias.edu DTSTART:20110222T140000Z DTEND:20110222T230000Z SUMMARY:Princeton University Physics Department Planck Workshop - Day 2, "See website" (Various) DESCRIPTION:The main goal of this workshop is to bring together members of the Planck consortium who will present early results from the experiment, and members of the astrophysical community with overlapping interests who can provide context for and feedback on these results. Plenty of discussion time will be scheduled. To register for the workshop, please fill out the Registration Form.The List of Registrants is updated automatically after each submission. To register for the workshop, please fill out the Registration Form. The deadline for registration has been postponed to February 12, 2011. LOCATION:A preliminary workshop program is posted on the website. COMMENT:The deadline for registration is February 12, 2011. URL:http://www.astro.princeton.edu/astroevents/planck2011/index.php END:VEVENT BEGIN:VEVENT UID:1298390400bd15fff79012a294324ba66744af07dc@sns.ias.edu DTSTART:20110222T160000Z DTEND:20110222T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar - NOTE LOCATION, "Some Field Theory Problems in Cosmology" (Steven Weinberg, University of Texas at Austin) DESCRIPTION: LOCATION:Bloomberg Hall Lecture Hall - NOTE NEW LOCATION COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298395800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110222T173000Z DTEND:20110222T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION:Special joint lunch for both astrophysics and physics members and faculty as well as attendees to the IAS Astrophysics Seminar or the IAS/PU HET Special Seminar with speaker Steven Weinberg. Please purchase your lunch in the IAS Dining Hall or bring your lunch. Coffee and tea provided in the Dilworth Room. LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129840120024be81ba0b4f2f50b25b8fa53b3612ea@sns.ias.edu DTSTART:20110222T190000Z DTEND:20110222T200000Z SUMMARY:Institute for Advanced Study High Energy Theory Special Seminar, "Pions in Large N Quantum Chromodynamics" (Steven Weinberg, University of Texas at Austin) DESCRIPTION: LOCATION:Bloomberg Hall Lecture Hall COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298410200ded1cbb92947414128438fd1021cdb1a@sns.ias.edu DTSTART:20110222T213000Z DTEND:20110222T223000Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Seminar, "Singularity-dominated Strong Fluctuations" (Sir Michael Berry, University of Bristol) DESCRIPTION:The Princeton Center for Theoretical Science, with support from D.E. Shaw & Co., has established a new annual visiting lectureship series that will bring each year an outstanding theoretical scientist to campus for a series of public lectures, seminars and informal discussions. Theinaugural PCTS Visiting Lecturer will be Sir Michael Berry (University of Bristol), who will be giving the Hamilton Lecture in Physics (Thursday, February 17th, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. ABSTRACT: The fluctuations of a physical quantity can be described by its moments. In many cases, these diverge as an asymptotic parameter becomes large (or small), through the influence of geometric singularities. These large moments are described by power laws whose exponents can be determined from a knowledge of the singularities. Examples are twinkling starlight, the sex life of moths, certain contour integrals, and several properties of spectra in quantum chaology. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/berry/berry.html END:VEVENT BEGIN:VEVENT UID:1298410200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110222T213000Z DTEND:20110222T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Exploring the Planet Mercury by Spacecraft: Seeking Clues to the Formation and Evolution of the Inner Planets" (Sean Solomon, Department of Terrestrial Magnetism, Carnegie Institution of Washington) DESCRIPTION:ABSTRACT: The planet Mercury is unusual by virtue of its small size and solar distance, high bulk density, unique rotation state, distinctive magnetic field, and exceptionally dynamic exosphere and magnetosphere. Improving our knowledge of Mercury thus offers an opportunity to understand more generally the range of outcomes for the formation and evolution of rocky planets. The MESSENGER spacecraft, developed under NASA's Discovery Program, is the first space probe to visit the planet Mercury in more than 30 years. MESSENGER flew by the innermost planet twice in 2008 and once in 2009 and is now on course for insertion into orbit about Mercury this March. A full Earth-year of orbital observations is planned for the remainder of the nominal mission. This talk will summarize what we've learned from the MESSENGER flybys regarding Mercury's magnetic field, internal structure, geological history, surface composition, exosphere, magnetosphere, and solar wind interaction; what we hope to learn from orbit; and how these lessons promise to deepen our understanding of the evolution of Earth-like planets. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12984696004f888567536775096e8f6c01c1134e71@sns.ias.edu DTSTART:20110223T140000Z DTEND:20110223T210000Z SUMMARY:Princeton University Physics Department Planck Workshop - Day 3, "See website" (Various) DESCRIPTION:The main goal of this workshop is to bring together members of the Planck consortium who will present early results from the experiment, and members of the astrophysical community with overlapping interests who can provide context for and feedback on these results. Plenty of discussion time will be scheduled. To register for the workshop, please fill out the Registration Form.The List of Registrants is updated automatically after each submission. To register for the workshop, please fill out the Registration Form. The deadline for registration has been postponed to February 12, 2011. LOCATION:A preliminary workshop program is available on the website COMMENT:The deadline for registration is February 12, 2011. URL:http://www.astro.princeton.edu/astroevents/planck2011/index.php END:VEVENT BEGIN:VEVENT UID:12984822001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110223T173000Z DTEND:20110223T183000Z SUMMARY:Princeton University Wunch Talk, "Collective Origin of Spiral Structure in Disk Galaxies" (Elena D'Onghia, Harvard-Center for Astrophysics) DESCRIPTION:ABSTRACT: It is now nearly 50 years since spiral structure in galaxies was recognized as likely originating from the action of density waves propagating through a differentially rotating disk. However, the origin of these features remains controversial. Recent studies have suggested that substructures in the dark matter halos of galaxies could induce spiral patterns in disks by generating localized disturbances that grow by swing amplification. However, there are indications that dark matter substructures orbiting in the inner regions of galaxy halos would be destroyed by dynamical processes such as disk shocking, and hence would not be able to seed the formation of spiral structure. Instead, we use high resolution numerical simulations to explore the idea that spiral arms might be seeded by density inhomogeneities orbiting in the disk itself. These perturbations can be identified with fluctuations in the distribution of gas in the interstellar medium of galaxies, such as giant molecular clouds. Our simulations show that when sufficient numbers of these perturbers are present, they collectively amplify to yield large-scale spiral patterns that resemble the spiral arms in flocculent and intermediate spiral galaxies. By combining our N-body experiments with simple analytic arguments, we develop a theory for spiral structure formation based on the "collective" effect of swing amplification. Our model makes numerous testable predictions, making it possible to finally confront the theory that spiral arms are stochastic with observations. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298565000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110224T163000Z DTEND:20110224T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Pure Disk Galaxy Puzzle" (James Peebles, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12985686002b66dc7c618e054f5c59b58ac618a29e@sns.ias.edu DTSTART:20110224T173000Z DTEND:20110224T183000Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Informal Lunch Talk, "Tsunami Asymptotics" (Sir Michael Berry, University of Bristol) DESCRIPTION:Bring your own lunch! The Princeton Center for Theoretical Science, with support from D.E. Shaw & Co., has established a new annual visiting lectureship series that will bring each year an outstanding theoretical scientist to campus for a series of public lectures, seminars and informal discussions. The inaugural PCTS Visiting Lecturer will be Sir Michael Berry (University of Bristol), who will be giving the Hamilton Lecture in Physics (Thursday, February 17th, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. ABSTRACT: For most of their propagation, tsunamis are linear dispersive waves whose speed is limited by the depth of the ocean and which can be regarded as diffraction-decorated caustics in spacetime. For constant depth, uniform asymptotics gives a very accurate compact description of the tsunami profile generated by an arbitrary initial disturbance. Variations in depth can focus tsunamis onto cusped caustics, and this singularity on a singularity constitutes an unusual diffraction problem, whose solution indicates that focusing can amplify the tsunami energy by an order of magnitude. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/berry/berry.html END:VEVENT BEGIN:VEVENT UID:12985830008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110224T213000Z DTEND:20110224T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "WIMPS and Beyond" (Jonathan Feng, University of California, Irvine) DESCRIPTION:ABSTRACT: A quarter of the Universe is composed of dark matter, but the particle identity of dark matter remains a deep mystery. I will review recent progress in resolving this puzzle, focusing on several leading classes of dark matter candidates, including WIMPs and related possibilities. I will discuss the theoretical motivations for these candidates, their diverse implications at the interface of particle physics, astroparticle physics, and cosmology, and the prospects for identifying dark matter in the coming years. LOCATION:Jadwin Hall, Room A10 - NOTE LOCATION COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129865320019663aae3328ab332e55083c8e1f7457@sns.ias.edu DTSTART:20110225T170000Z DTEND:20110225T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 - TITLE ADDED, "Asymptotically AdS Spacetimes with a Generalized Harmonic Evolution Scheme" (Hans Bantilan, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: Motivated by the gauge/gravity duality, we introduce a numerical scheme based on generalized harmonic coordinates to solve the Einstein field equations on an asymptotically anti-de Sitter spacetime. We work in global AdS$_5$, which can be described by the $(t,r,chi, heta,phi)$ coordinates adapted to the $R imes S^3$ boundary. We focus on solutions that preserve the SO(3) symmetry that acts to rotate the 2-spheres parametrized by $( heta,phi)$. This allows us to study axisymmetric physics in the bulk, corresponding to spherically symmetric physics in the boundary CFT. We present results from an ongoing study of black hole formation and subsequent quasinormal ring-down via scalar field collapse. This ring-down can be interpreted holographically as motions of an otherwise static plasma on $S^3$, or as perturbations of a radial flow of thermal matter on Minkowski space, and is intended as a precursor to simulations in the gravity dual that have application to heavy-ion collisions. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12986532006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110225T170000Z DTEND:20110225T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Tom Essinger-Hileman, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298653200d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110225T170000Z DTEND:20110225T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Guilherme Pimentel, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1298912400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110228T170000Z DTEND:20110228T180000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12989142004967dfd215151eaf962aab1c11cae18b@sns.ias.edu DTSTART:20110228T173000Z DTEND:20110228T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - NOTE START TIME, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129891870013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110228T184500Z DTEND:20110228T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Correlations Between BHs and Galaxies" (Greg Novak - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here are the two papers for Galread on Monday: http://arxiv.org/abs/0704.1860 and http://arxiv.org/abs/1006.0482 . I expect that this will be someone different from the usual galreaddiscussion, where we spend a lot of time struggling to understand exactly what the authors did and how that does/does not affect their conclusions. Both of these papers are rather trivial in both their basic point and themethods they use to establish the point. The reason I'm proposing them is to hear peoples' opinions about whether these papers represent an interesting/instructive/worthwhile way of looking at the correlationsbetween BHs and galaxies. The only paper that deals with the point made by either of the above in a serious way is this one: http://arxiv.org/abs/1005.2100 . So it may be worth taking a look at that one, too. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/0704.1860 END:VEVENT BEGIN:VEVENT UID:129899520081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110301T160000Z DTEND:20110301T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Sizes and Shapes of Drops Created in High Speed Impacts" (Peter Goldreich, California Institute of Technology and Institute for Advanced Study) DESCRIPTION:ABSTRACT: High speed impacts of large bodies on Earth launch ejecta on trajectories that transport them thousands of kilometers from the impact site. These events are recorded in discrete layers of sub-millimeter size spherulesin sea floor sediments. Larger, rarer, and interestingly shaped objects are found on land. I will describe the physical processes that occur in energetic impacts. Emphasis will be given to the mechanisms that determine the sizes and shapes of the ejecta and the cooling of the fireball. An analogy will be drawn with processes that occur in the expanding universe. A possible relation to the origin of chondrules will be explored. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299000600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110301T173000Z DTEND:20110301T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12990042008ccf5c6930b1adff0cd74e0e31557db2@sns.ias.edu DTSTART:20110301T183000Z DTEND:20110301T203000Z SUMMARY:Princeton University Department of Physics Special Seminar, "Experimental Gravity with LIGO" (Sam Waldman, California Institute of Technology) DESCRIPTION:ABSTRACT: The direct detection of gravitational waves (GWs) offers a revolutionary new probe of the most energetic processes in the universe and a test of general relativity in new regimes. The 4 km long LIGO interferometers have demonstrated the sub-attometer displacement sensitivity (< 10^{-18} m/ Hz^{1/2}) and continuous operation (> 75\% duty factor) needed to detect GWs out beyond the Virgo cluster, but none have yet been seen. Starting in 2008, we began construction of a 2nd generation of interferometers, Advanced LIGO, to increase the detector sensitivity and bandwidth by more than an order of magnitude. In this talk I will review the next five years of physics challenges and experiments involved in building and commissioning Advanced LIGO. We will discuss our plans to commission active seismic isolation systems with picometer displacement noise, low-loss passive isolation systems with mechanical quality factors >10^7, and Michelson interferometers with 750 kW of stored power. Together, these systems form a detector capable of detecting the 2x10^{-20} m GW signal from two black holes coalescing 6 billion light years away. We expect Advanced LIGO to detect the most powerful sources -- the merger of two compact objects such as neutron stars and black holes -- with rates from a few to many per year. The GW waveform, together with electromagnetic observations, will allow tests of the physics of black holes and general relativity. As the Advanced LIGO program continues, we will continue to improve the interferometer sensitivity using techniques from integrated photonics, material science, and quantum measurement. LOCATION:Jadwin Hall, Room 303 COMMENT: URL:http://www.princeton.edu/physics/events/viewevent.xml?id=210 END:VEVENT BEGIN:VEVENT UID:1299015000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110301T213000Z DTEND:20110301T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Exoplanets in Projection" (John Johnson, California Institute of Technology) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12990870001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110302T173000Z DTEND:20110302T183000Z SUMMARY:Princeton University Wunch Talk, "Modeling Accretion Disks around Coalescing Supermassive Black Hole Binaries" (Takamitsu Tanaka, Columbia University) DESCRIPTION:ABSTRACT: The next generation of gravitational-wave (GW) observatories is expected to detect the gravitational radiation from coalescing super massive black hole (SMBH) binaries. The time-dependent waveforms can be used to determine the masses, spins, luminosity distance and the approximate sky position of these objects. If they also have a tell-tale electromagnetic signature, then concomitant multi-messenger observations will allow (i) measurement of the cosmic expansion history, and (ii) follow-up electromagnetic studies of SMBHs whose masses are already known through GWs. I will discuss semi-analytic models for the thermal emission properties of thin accretion disks around coalescing SMBH binaries, and how these systems might be distinguished from accretion disks around solitary SMBHs. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299169800e62ae0b4145851377a3c67b47f5c1a63@sns.ias.edu DTSTART:20110303T163000Z DTEND:20110303T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - TITLE UPDATED, "The Golden Age of Exoplanet Spin-Orbit Measurements" (John Johnson, California Institute of Technology) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129918780019d25b36a30fd9fc76f57fb4b4c2dfdb@sns.ias.edu DTSTART:20110303T213000Z DTEND:20110303T223000Z SUMMARY:Princeton University Department of Physics Colloquium - TITLE ADDED, "How to Get a Superconductor Out of a Black Hole" (Chris Herzog, Princeton University) DESCRIPTION:ABSTRACT: Gauge/gravity duality, a concept which emerged from string theory, holds promise for revealing the secrets of certain strongly interacting real world condensed matter systems. Historically, string theorists presented their subject as a promising framework for a quantum theory of gravity. More recently, the AdS/CFT correspondence and gauge/gravity dualities have emerged as powerful tools for using what we already know about gravity to investigate the properties of strongly interacting field theories. I will cherry pick and discuss a few recent developments where black holes are used to calculate the thermodynamic and transport properties of quantum critical systems, superconductors, and superfluids. LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299258000d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110304T170000Z DTEND:20110304T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Hans Bantilan, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:12992580006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110304T170000Z DTEND:20110304T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Tom Essinger-Hileman, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:129925800019663aae3328ab332e55083c8e1f7457@sns.ias.edu DTSTART:20110304T170000Z DTEND:20110304T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 - TITLE ADDED, "Weak Lensing Science, Surveys, and Systematics" (Lucas Parker, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: (Authors: Sudeep Das, Roland de Putter, Eric V. Linder, and Reiko Nakajima.) Weak gravitational lensing is one of the key probes of the cosmological model, dark energy, and dark matter, providing insight into both the cosmic expansion history and large scale structure growth history. Taking into account a broad spectrum of physics affecting growth, dynamical dark energy, extended gravity, neutrino masses, and spatial curvature, we analyze the cosmological constraints. Similarly we consider the effects of a range of systematic uncertainties, in shear measurement, photometric redshifts, and the nonlinear power spectrum, on cosmological parameter extraction. We also investigate, and provide fitting formulas for, the influence of survey parameters such as redshift depth, galaxy number densities, and sky area. Finally, we examine the robustness of results for different fiducial cosmologies.Link to paper: http://arxiv.org/abs/1102.5090 . LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://arxiv.org/abs/1102.5090 END:VEVENT BEGIN:VEVENT UID:12995190004967dfd215151eaf962aab1c11cae18b@sns.ias.edu DTSTART:20110307T173000Z DTEND:20110307T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - NOTE START TIME, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299523500d743eb3d056709f71d92cffa8a1c352c@sns.ias.edu DTSTART:20110307T184500Z DTEND:20110307T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - CANCELED DESCRIPTION: LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:129960000081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110308T160000Z DTEND:20110308T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Magnetic Star - Disk Interactions and Spin-Orbit Misalignment in Exoplanetary Systems" (Dong Lai, Cornell University) DESCRIPTION:ABSTRACT: Recent observations have shown that in many exoplanetary systems, the spin axis of the parent star is misaligned with the angular momentum axis of the planet's orbit. This is unexpected as planets are formed in protostellar disks which are thought to be perpendicular to the stellar rotation axis. Surprisingly, the interaction between a magnetic protostar and its circumstellar disk gives rise to a secular instability, which may result in spin-orbit misalignment following planet formation, even before any additional few-body gravitational interaction takes place. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299605400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110308T173000Z DTEND:20110308T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299619800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110308T213000Z DTEND:20110308T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Gravitational Lensing and Dark Matter Substructure" (Chuck Keeton, Rutgers, The State University of New Jersey) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12996918001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110309T173000Z DTEND:20110309T183000Z SUMMARY:Princeton University Wunch Talk, "The Progenitor-Independent Nature of Gamma-Ray Burst Pulses" (Jon Hakkila, College of Charleston) DESCRIPTION:ABSTRACT: The most luminous sources in the universe, gamma-ray bursts (GRBs), also appear to have among the simplest emission characteristics. The bulk of GRB prompt emission can be de-convolved into distinct pulses having simple, correlated behaviors; these behaviors include pulse duration, peak luminosity, lag, spectral hardness, and shape. Because these behaviors have not always been recognized and because pulses are faint and often overlap, many correlated properties attributed to GRB bulk emission are in fact pulse characteristics that have been smeared out when their properties have been indiscriminately combined. And yet, remarkably, correlated pulse properties are observed in both the Long and Short GRB classes, are significantly more pronounced than observed cosmological effects caused by time dilation and the inverse square law, and appear to indicate a single energy relaxation process. This talk summarizes the correlated characteristics of GRB pulses, along with the repercussions of the pulse paradigm on theoretical GRB models. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299774600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110310T163000Z DTEND:20110310T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Cosmic Bumps Make Two Humps" (Matthew Kleban, New York University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12997881005aa7f6c1ef3128d4d5a79ff804cb703a@sns.ias.edu DTSTART:20110310T201500Z DTEND:20110310T211500Z SUMMARY:Institute for Advanced Study Informal Astrophysics Talk, "Retrograde Hot Jupiters from Secular Planet-Planet Interactions" (Will Farr, Northwestern University) DESCRIPTION:Will Farr (Northwestern) is going to give an informal talk on his recent work on Hot Jupiters, 'Retrograde Hot Jupiters from Secular Planet-Planet Interactions' (http://arxiv.org/abs/1011.2501) . LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://arxiv.org/abs/1011.2501 END:VEVENT BEGIN:VEVENT UID:12997926008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110310T213000Z DTEND:20110310T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Christophe Salomon, Directeur de Recherche au CNRS Laboratoire Kastler Brossel) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1299862800d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110311T170000Z DTEND:20110311T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Blake Sherwin, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12998628006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110311T170000Z DTEND:20110311T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (William East, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12998628009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110311T170000Z DTEND:20110311T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "The ExaVolt Antenna: A Large-Aperture, Balloon-embedded Antenna for Ultra-high Energy Particle Detection" (Jon Gudmundsson, Princeton University) DESCRIPTION:The Friday noon talks are catered by Hoagie Haven. See the website for details. ABSTRACT: (Authors: P. W. Gorham et al.) We describe the scientific motivation, experimental basis, design methodology, and simulated performance of the ExaVolt Antenna (EVA) mission, and planned ultra-high energy (UHE) particle observatory under development for NASA`s suborbital super-pressure balloon program in Antarctica. EVA will improve over ANITA`s integrated totals - the current state-of-the-art in UHE suborbital payloads - by 1-2 orders of magnitude in a single flight. The design is based on a novel application of toroidal reflector optics which utilizes a super-pressure balloon surface, along with a feed-array mounted on an inner membrane, to create an ultra-large radio antenna system with a synoptic view of the Antarctic ice sheet below it. Radio impulses arise via the Askaryan effect when UHE neutrinos interact within the ice, or via geosynchrotron emission when UHE cosmic rays interact in the atmosphere above the continent. EVA`s instantaneous antenna aperture is estimated to be several hundred square meters for detection of these events within a 150-600 MHz band. For standard cosmogenic UHE neutrino models, EVA should detect of order 30 events per flight in the EeV energy regime. For UHE cosmic rays, of order 15,000 geosynchrotron events would be detected in total, several hundred above 10 EeV, and of order 60 above the GZK cutoff energy. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:12998646002806713029e3a83cf4399385a28c3e05@sns.ias.edu DTSTART:20110311T173000Z DTEND:20110311T183000Z SUMMARY:Princeton University Special Astrophysics Talk (SPECIAL LOCATION) - TITLE CORRECTED, "Fermi Observation of Blazars and Implications for the Origin of Gamma-rays" (Juri Poutanen, University of Oulu, Finland) DESCRIPTION:ABSTRACT: GeV spectra of the brightest blazars detected by the Fermi Gamma-ray Space Telescope cannot be described by a simple power law model. A much better description is obtained with a broken power law, withthe break energies of a few GeV. We show that the sharpness and the position of the breaks can be wellreproduced by absorption of gamma-rays viaphoton--photon pair production on He II and H I Lyman recombination continuum and lines. This implies that the blazar zone lies inside the region of the highest ionization of the broad-line region (BLR) within a light-year from a super-massive black hole. The observations of gamma-ray spectral breaks open a way of studying the BLR photon field in the extreme-UV/soft X-rays, which are otherwise hidden from our view. LOCATION:Peyton Hall, Room 140 (NOTE SPECIAL LOCATION) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300118400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110314T160000Z DTEND:20110314T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300120200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110314T163000Z DTEND:20110314T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130012470013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110314T174500Z DTEND:20110314T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Stellar Feedback" (Marilena LoVerde - Discussion Leader, Institute for Advanced Study) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. These are the papers to be discussed: "Stellar Feedback in Dwarf Galaxy Formation," by Sergey Mashchenko, James Wadsley, and H. M. P. Couchman, http://lanl.arxiv.org/abs/0711.4803 . And "Cosmological puzzle resolved by stellar feedback in high redshift galaxies," by Sergey Mashchenko, H. M. P. Couchman, and James Wadsley, http://lanl.arxiv.org/abs/astro-ph/0605672 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://lanl.arxiv.org/abs/0711.4803 END:VEVENT BEGIN:VEVENT UID:130020120081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110315T150000Z DTEND:20110315T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Nature of Damped Lyman Alpha Systems" (Renyue Cen, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300206600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110315T163000Z DTEND:20110315T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300221000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110315T203000Z DTEND:20110315T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Detecting Gravitational Waves (and Doing Other Cool Physics) with Millisecond Pulsars" (Scott Ransom, The National Radio Astronomy Observatory) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13002930001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110316T163000Z DTEND:20110316T173000Z SUMMARY:Princeton University Wunch Talk, "A New Scenario for Coevolution of Galaxies and Supermassive Black Holes" (Renyue Cen, Princeton University) DESCRIPTION:ABSTRACT: The conventional scenario of coevolution of galaxies and supermassive black holes where feedback from the growth of supermassive black holes is invoked to regulate and shut off star formation for a starburst event appears to be at odds with latest observations. In this talk I will first argue that that scenario is not required or warranted energetically. I will then present a new scenario that is based largely on known physics and, more importantly, provides predictions that are broadly in agreement with observations. This may have important implications on both classes of concerned objects. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300375800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110317T153000Z DTEND:20110317T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Reconstructing Baryon Oscillations : Theoretical and Observational Perspectives" (Nikhil Padmanabhan, Yale University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300725000cdea61576f2452f0ff6ba4b556351637@sns.ias.edu DTSTART:20110321T163000Z DTEND:20110321T173000Z SUMMARY:Princeton Institute for Computational Science and Engineering Colloquium, "Toward Exascale Computing in Gyrokinetic Particle-in-Cell Simulations of Fusion Plasmas" (Stephanie Ethier, Princeton Institute for Computational Science and Engineering (PICSciE's)) DESCRIPTION:Lunch served at 11:45 pm at PICSciE reception area, 300 Lewis Science Library. ABSTRACT: The last decade has witnessed a rapid emergence of larger and faster computing systems in the US supercomputing centers. Massively parallel machines have gone mainstream and are now the tool of choice for large scientific simulations. Scientific applications need to be modified, adapted, and optimized for each new system being introduced. With a few petascale systems now in production mode, the focus of the DOE Office of Advanced Scientific Computing Research has now shifted to the next level of "Exascale", which promises to be truly disruptive. With an estimated billion cores to deal with, scientific applications will need to manage extreme parallelism, limited bandwidth, frequent failures, and many more hardware and software challenges. In this talk, I will discuss the path to extreme scale computing from the point of view of the large-scale gyrokinetic particle-in-cell codes developed at Princeton University's Plasma Physics Laboratory to study microturbulent transport in fusion plasmas. LOCATION:Princeton University, Visualization Lab, 346 Lewis Science Library COMMENT: URL:www.picscie.princeton.edu END:VEVENT BEGIN:VEVENT UID:1300725000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110321T163000Z DTEND:20110321T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Pedagogical Discussion of Topological Defects in Cosmology" (David Spergel, Princeton University) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130072950013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110321T174500Z DTEND:20110321T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Black Holes and Their DM Haloes" (Doug Richstone - Discussion Leader, Institute for Advanced Study) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. We will discuss two papers which (appear to) disagree on the halo -- black hole relationship. They are not long: http://arxiv.org/abs/1103.1644 and http://arxiv.org/abs/1101.4650 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130080600081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110322T150000Z DTEND:20110322T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "20th Century Global Warming - Anthropogenic or Solar?" (Nir Shaviv, Hebrew University) DESCRIPTION:ABSTRACT: The 20th Century has seen a notable temperature rise, generally attributed to the greenhouse effect of anthropogenic gases, and a future "business as usual" policy is generally believed to be catastrophic. I will show, however, that the story is not that simple. I will address the following questions,all of which have a far fromtrivial and often surprising answer: How large is the greenhouse effect? Could some of the temperature rise be natural and not anthropogenic? If so, what is this natural driver? How sensitive really is Earth's climate? What should we expect in the future? How effective will the implementation of a cap and trade agreement be? LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300811400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110322T163000Z DTEND:20110322T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300825800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110322T203000Z DTEND:20110322T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Super Earths and Life" (Dave Latham, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13008978001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110323T163000Z DTEND:20110323T173000Z SUMMARY:Princeton University Wunch Talk, "Primordial Non-Gaussianity in Large-scale Structure" (Marilena LoVerde, Institute for Advanced Study) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1300980600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110324T153000Z DTEND:20110324T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Super-Eddington Accretion Disks" (Nir Shaviv, Hebrew University) DESCRIPTION:ABSTRACT: I will review our present understanding of super-Eddington atmospheres, as borne from theory and observations. In particular, I will show how atmospheres can sustain super-Eddington fluxes, while accelerating only ``moderate'' mass loss. This will then be applied to the modeling of super-Eddington accretion disks. Such models can have net accretion which is super-critical and a net luminosity which is super-Eddington. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13010688009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110325T160000Z DTEND:20110325T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "A First Detection of the Power Spectrum of Gravitational Lensing with ACT" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13010688006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110325T160000Z DTEND:20110325T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Jon Gudmundsson, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301068800d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110325T160000Z DTEND:20110325T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (BingKan Xue, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301328000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110328T160000Z DTEND:20110328T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301329800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110328T163000Z DTEND:20110328T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130133430013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110328T174500Z DTEND:20110328T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "SLACS: Density Profiles of Early Type Strong Lens Galaxies" (Rachel Mandelbaum - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here are the papers to be discussed: http://adsabs.harvard.edu/abs/2010ApJ...721L.163A and http://adsabs.harvard.edu/abs/2010ApJ...709.1195T. Both papers are relatively recent SLACS papers that attempt to model the density profiles of early type strong lens galaxies, and to disentangle the separate components. I will confess to an ulterior motive in selecting these papers: some of the data look qualitatively consistent with what several of us have seen in SDSS using weak lensing plus kinematics ( http://adsabs.harvard.edu/abs/2010MNRAS.408.1463S ), but the conclusions that are drawn based on the modeling are somewhat different. So I would like to understand the modeling in more detail, and how the conclusions depend on their sets of assumptions in detail. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130141080081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110329T150000Z DTEND:20110329T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Gravitational Waves from Cosmic Phase Transitions" (Lawrence Krauss, Arizona State) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301416200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110329T163000Z DTEND:20110329T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301430600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110329T203000Z DTEND:20110329T213000Z SUMMARY:Princeton University Astronomy Colloquium, "What is a Galaxy?" (Beth Willman, Haverford College) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13015026006f5ea4e033a6aa0d6c84c0128eed49e9@sns.ias.edu DTSTART:20110330T163000Z DTEND:20110330T173000Z SUMMARY:Princeton University Wunch Talk - SPEAKER CHANGED, "Linear and Non-linear Evolution of Density Waves Generated by Low Mass Planets in Protostellar Disks" (Ruobing Dong, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301585400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110331T153000Z DTEND:20110331T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Gravitational Wave Astronomy in the Advanced Detector Era" (Sean T. McWilliams, Columbia University and Princeton University) DESCRIPTION:ABSTRACT: With the imminent start of Advanced LIGO/VIRGO observations, and the less imminent but much hoped-for advent of LISA, gravitational wave science will transition from a specialty of theoretical astrophysics and experimental interferometry to a specialty of observational astronomy. To take full advantage of second-generation instruments capable of precision gravitational wave measurements, we require a detailed understanding of the anticipated gravitational waves, as well as any electromagnetic signatures that may be coincident. To this end, I will discuss recent work estimating the achievable accuracy for modeling and ultimately measuring compact binary parameters from gravitational wave observations, as well as potential electromagnetic signatures that may accompany these events. I will also discuss the potential for a novel constraint of dark energy through coincident gravitational wave and electromagnetic measurements, and the outstanding issues that must be solved to maximize the achievable science from these observations. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130160340019d25b36a30fd9fc76f57fb4b4c2dfdb@sns.ias.edu DTSTART:20110331T203000Z DTEND:20110331T213000Z SUMMARY:Princeton University Department of Physics Colloquium - TITLE ADDED, "Dark Energy and the Accelerating Universe: One Observationalist's Mid-Semester Report Card" (Saul Perlmutter, Lawrence Berkeley Laboratory, University of California, Berkeley and Institute for Advanced Study) DESCRIPTION:ABSTRACT: A decade since the realization that our universe's expansion is accelerating, the ball remains squarely in the observationalists' court -- as the theorists look for more constraints on the parameter space. I will discuss some of the progress that has been made, and the prospects for upcoming advances. The supernova measurements have improved dramatically, and I will show new evidence that that they have not yet reached their ultimate capability. Combined with the advances in the other techniques, we have the hope of distinguishing alternative explanations of the accelerating universe. The next big step calls for new facilities on the ground and in space. LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13016736009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110401T160000Z DTEND:20110401T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Eccentric Black Hole - Neutron Star Binaries" (William East, Princeton University) DESCRIPTION:ABSTRACT: There is a high level of interest in neutron star - black hole binaries, not only because their mergers may be detected by gravitational wave observatories in the coming years, but also because of the possibility that they could explain short duration gamma-ray bursts. Observations of the afterglow of such bursts as well as theoretical studies of globular cluster evolution suggest that some of these events arise from dynamically formed black hole -neutron star binaries, which are likely to merge with non-negligible eccentricity. We preform general relativistic hydrodynamical simulations of such binaries in order to understand their evolution, gravitational wave signature and resulting disk formation. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13016736006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110401T160000Z DTEND:20110401T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Alexandra Rahlin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301673600d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110401T160000Z DTEND:20110401T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (BingKan Xue, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1301934600ad25362cef2a68434cb467973dc58f1a@sns.ias.edu DTSTART:20110404T163000Z DTEND:20110404T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - SPEAKER/TOPIC UPDATED, "Acceleration from New Types of Scalar Fields as an Alternative to the Cosmological Constant and Quintessence" (Ignacy Sawicki, Heidelberg University) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130193910013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110404T174500Z DTEND:20110404T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Dark Satellite Dwarf Galaxies" (John Wise - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here are the papers: "Too big to fail? The puzzling darkness of massive Milky Way subhalos," (Boylan-Kolchin et al.): http://arxiv.org/abs/1103.0007 and "Mechanisms of Baryon Loss for Dark Satellites in Cosmological SPH Simulations," (Nickerson et al.): http://arxiv.org/abs/1103.3285 LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1103.0007 END:VEVENT BEGIN:VEVENT UID:130201560081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110405T150000Z DTEND:20110405T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Galaxy Gas Flows" (Mary Putman, Columbia University) DESCRIPTION:ABSTRACT: Many galaxies exhibit the need for a continual source of star formation fuel. Halo gas is a common feature of these galaxies, though utilizing this gas as fuel may require the gas to go through multiple phases. I will discuss new observations and simulations that investigate galaxy gas flows to determine how baryons get into galaxies and metals are mixed throughout their gaseous disks. I will also discuss a population of newly discovered cold clouds that may represent a combination of cooling disk gas, new dwarf galaxies, and stellar feedback. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302021000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110405T163000Z DTEND:20110405T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302035400c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110405T203000Z DTEND:20110405T213000Z SUMMARY:Princeton University Astronomy Colloquium, "On the Dynamics of Extrasolar Planetary Systems" (Caroline Terquem, Institut d'Astrophysique de Paris) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13021074001f6fbf8a7b18ffdda11f623533b1c9b2@sns.ias.edu DTSTART:20110406T163000Z DTEND:20110406T173000Z SUMMARY:Princeton University Wunch Talk - TITLE ADDED, "The CO Survey of Nearby Galaxies with Nobeyama and CARMA" (Jennifer Donovan Meyer, Stony Brook University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302190200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110407T153000Z DTEND:20110407T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Testing Lorentz Invariance with Cosmic Gamma-Rays, Ultrahigh Energy Cosmic Rays and Neutrinos" (Floyd Stecker, Goddard Space Flight Center/National Aeronautics and Space Administration) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13022082008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110407T203000Z DTEND:20110407T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Tests of Lorentz and CPT Invariance with Atomic Spin Magnetometers"" (Michael Romalis, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130227840019663aae3328ab332e55083c8e1f7457@sns.ias.edu DTSTART:20110408T160000Z DTEND:20110408T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 - TITLE ADDED, "Interferometers as Holographic Clocks" (Katerina Visnjic, Princeton University) DESCRIPTION:ABSTRACT: It is proposed that a particular configuration of Michelson interferometers can test a particular physical interpretation of noncommutative geometry with Planckian precision. In the proposed holographic interpretation, the transverse position of a body, measured by comparing interactions with null fields porpagating in different directions, displays a new kind of uncertainty that resembles random errors of a Planckian clock. It is argued that in a Michelson interferometer the uncertainly is observable as a directionally coherent "holographic noise" in phase. Predicted phase correlations are estimated and compared with the sensitivities of current and planned interferometer experiments. It is shown that nearly co-located Michelson interferometers of modest scale,cross-correlated at high frequency (comparable to the inverse light travel time), should be able to test the Planckian noise prediction with current technology. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13022784006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110408T160000Z DTEND:20110408T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302278400d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110408T160000Z DTEND:20110408T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Lucas Parker, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302539400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110411T163000Z DTEND:20110411T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130254390013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110411T174500Z DTEND:20110411T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Galaxies and Their Globular Clusters" (Claire Lackner - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here are links to the papers: http://adsabs.harvard.edu/abs/2011MNRAS.tmp..306F and http://adsabs.harvard.edu/abs/2010MNRAS.406.1967G . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT:See description for link to second paper. URL:http://adsabs.harvard.edu/abs/2011MNRAS.tmp..306F END:VEVENT BEGIN:VEVENT UID:130262040081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110412T150000Z DTEND:20110412T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Collective Origin of Spiral Structure in Disk Galaxies" (Lars Hernquist, Harvard University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302625800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110412T163000Z DTEND:20110412T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302640200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110412T203000Z DTEND:20110412T213000Z SUMMARY:Princeton University Astronomy Colloquium, ""Gas Cooling and Accretion in Clusters and Galaxies"" (Greg Bryan, Columbia University) DESCRIPTION:ABSTRACT: Approximately half of present-day X-ray clusters show evidence for "cooling flows" in their cores: the presence of cool (few keV) X-ray emitting gas is highly correlated with signs of AGN feedback. There is, in addition, evidence of cold gas that has condensed out of the core, as well as recent star formation. While it seems clear that radiative cooling and episodic AGN heating are balanced over time, the way that gas actually cools and accretes onto the supermassive black hole is unclear. I will present simulations that follow the gas from Mpc scales down to a few parsecs, and show in detail how the gas can actually cool and accrete. A related problem is how cold gas gets into galactic-sized halos, to feed star formation in spiral disks. With cosmological simulations, I will show the cold, filamentary flows that feed galaxies at early times. However, at late times, these flows heat up, and don't deliver enough cold gas to match the star formation rate of disk galaxies, and an addition source of fuel is required. One interesting possibility is thermal instabilities in the galactic halo, and I'll show how this can -- and cannot -- work. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13027122001f6fbf8a7b18ffdda11f623533b1c9b2@sns.ias.edu DTSTART:20110413T163000Z DTEND:20110413T173000Z SUMMARY:Princeton University Wunch Talk - TITLE ADDED, "Small Scale Structure in the Epoch of Reionization" (Marcelo Alvarez, Canadian Institute for Theoretical Astrophysics) DESCRIPTION:ABSTRACT: Dense clouds of neutral hydrogen in early minihalos and the first galaxies were likely to be present throughout the reionization process, serving as opaque barriers to ionizing radiation and impeding the growth of cosmic HII regions. After reionization, these clouds have been detected as Lyman-limit systems in the spectra of high-redshift quasars, and determine the mean free path of ionizing radiation. I will first show results of large scale simulations of reionization which include a finite mean free path due to Lyman-limit systems, showing how the end of reionization can be delayed significantly if the mean free path is as short as some estimates would indicate. I will then discuss ongoing hydrodynamic simulations which attempt to determine the mean free path at earlier times from first principles, and show how the results from these small-scale calculations can be used to create more realistic models of the reionization process on much larger scales. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302795000059b1f533d5f86125e6e8ca9a4c120d6@sns.ias.edu DTSTART:20110414T153000Z DTEND:20110414T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - TITLE ADDED, "Dark Energy Measurements from Supernovae: One Observationalist's Mid-Semester Report Card" (Saul Perlmutter, Lawrence Berkeley Laboratory, University of California, Berkeley and Institute for Advanced Study) DESCRIPTION:ABSTRACT: A decade since the realization that our universe's expansion is accelerating, the ball remains in the observationalists' court -- as the theorists look for more constraints on the parameter space.I will discuss some of the progress that has been made, and the prospects for upcoming advances, primarily focusing on the supernova measurements.The supernova measurements have improved dramatically, and I will show new evidence that that they have not yet reached their ultimate capability.Combined with the advances in the other techniques, we have the hope of distinguishing alternative explanations of the accelerating universe.The next big step calls for new facilities on the ground and in space. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1302808500c2ea3520239247aaface3f77b0037fdc@sns.ias.edu DTSTART:20110414T191500Z DTEND:20110414T201500Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar and Discussion - ADDED, "Planetary Migration" (Sijme-Jan Paardekooper, Department of Applied Mathematics and Theoretical Physics (DAMTP) of the University of Cambridge) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13028130008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110414T203000Z DTEND:20110414T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Ultra-high Throughput Studies of Single Cells for Quantitative Studies of Evolution" (David Weitz, Harvard University) DESCRIPTION:ABSTRACT: This talk will describe the use of a drop-based microfluidic system for ultra-high throughput screening studies that enable quantitative investigation of fundamental questions in evolution. This system enables library sizes of 10^7 to 10^8 individual cells in very short times. I will describe applications of the system to the study the evolution of enzymes using libraries of yeast. In addition, I will describe investigations of diversity in microbes that have not otherwise been cultured, coming from both soil samples and from the human gut. LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130288320022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20110415T160000Z DTEND:20110415T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "Inflation, Reionization, and All That: The Primordial Inflation Explorer" (Al Kogut, Goddard Space Flight Center/National Aeronautics and Space Administration) DESCRIPTION:ABSTRACT: The Primordial Inflation Explorer is an Explorer-class mission to measure the gravity-wave signature of primordial inflation through its distinctive imprint on the linear polarization of the cosmic microwave background. PIXIE uses an innovative optical design to achieve background-limited sensitivity in 400 spectral channels spanning 2.5 decades in frequency from 30 GHz to 6 THz (1 cm to 50 micron wavelength). The principal science goal is the detection and characterization of linear polarization from an inflationary epoch in the early universe, with tensor-to-scalar ratio r < 10^{-3) at 5 standard deviations. The rich PIXIE data set will also constrain physical processes ranging from Big Bang cosmology to the nature of the first stars to physical conditions within the interstellar medium of the Galaxy. I describe the PIXIE instrument and mission architecture needed to detect the inflationary signature using only 4 semiconductor bolometers. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13028877005caebee28c8a04279c9c1e8f27e5fd1d@sns.ias.edu DTSTART:20110415T171500Z DTEND:20110415T181500Z SUMMARY:Princeton University Special Astrophysics Talk - ADDED, "Disk Accretion onto Neutron Stars with Weak Magnetic Field: Deceleration of Rapidly Rotating Matter in a Spreading Layer" (Rashid Sunyaev, Max-Planck Institute for Astrophysics and Institute for Advanced Study) DESCRIPTION: LOCATION:Peyton Hall, Room 140 (NOTE LOCATION) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13031442001d4357d162a3eed51addc84649274fd7@sns.ias.edu DTSTART:20110418T163000Z DTEND:20110418T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - CANCELED DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130322520081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110419T150000Z DTEND:20110419T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Diverse Energy Sources for Supernovae" (Lars Bildsten, Kavli Institute for Theoretical Physics, University of California, Santa Barbara) DESCRIPTION:ABSTRACT: The theoretical community is beginning to appreciate (and predict) the potential diversity of explosive outcomes from stellar evolution while the supernovae surveys are finding new kinds of supernovae. I willspeak about two such new supernovae. The first are ultraluminous core collapse supernovae with radiated energies approaching 1051 ergs. I will present our recent work that explains these events with late-time energy deposition from rapidly rotating, highly magnetized neutronstars: magnetars. I will close with our theoretical work on helium shell detonations on accreting white dwarfs that predict a new class of supernovae; called ".Ia's". The first such candidate may well have been found by the Palomar Transient Factory. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303230600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110419T163000Z DTEND:20110419T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303245000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110419T203000Z DTEND:20110419T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Baryon Acoustic Oscillations: A Robust and Precise Route to the Cosmological Distance Scale" (Daniel Eisenstein, Harvard University) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13033170001f6fbf8a7b18ffdda11f623533b1c9b2@sns.ias.edu DTSTART:20110420T163000Z DTEND:20110420T173000Z SUMMARY:Princeton University Wunch Talk - TITLE ADDED, "Constraining the Dawn of Cosmic Structure and the Epoch of Reionization with the 21 cm Line" (Jonathan Pritchard, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130332690013735387a4aad4c194c4d9654d3ec245@sns.ias.edu DTSTART:20110420T191500Z DTEND:20110420T201500Z SUMMARY:Institute for Advanced Study Blackboard Seminar, "Giant Planet Formation and Gravitational Instability" (Roman Rafikov, Princeton University) DESCRIPTION:Roman will give the second part of his blackboard seminar on giant planet formation. Boaz Katz is the organizer. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130333050039a59f2ea4b62345e243fd7e6786d0d9@sns.ias.edu DTSTART:20110420T201500Z DTEND:20110420T211500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia, "Physics of Solar Coronal Mass Ejections (CMEs): Theory and Observation" (James Chen, Naval Research Laboratory) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 4:00 pm, seminar is at 4:15 pm. ABSTRACT: First discovered in 1971, coronal mass ejections (CMEs) occur in close association with solar flares and are now known to be the solar drivers oflarge geomagnetic storms. The physical mechanism of the phenomenon has been studied based on the paradigm that the energy of eruption is derived from the coronal magnetic field via reconnection. This concept was initiallyadvanced by Giovanelli in the 1940s to explain solar flares and has been carried over to CME models. The development of a successful CME and solar flare model within this framework remains a major objective of solarphysics. In this talk, I will present an alternative concept that does not require reconnection and yields model CME dynamics in good quantitative agreement with data. The basic driving force is the toroidal Lorentz hoop force acting on a flux rope with two legs anchored in the Sun. The initialflux rope is driven out of equilibrium by increasing its poloidal flux. The calculated acceleration and subsequent propagation of model CMEs have been shown to correctly replicate the observed CME dynamics from the Sun to 1 AU(STEREO data), with the computed plasma and magnetic field parameters at 1 AU in close agreement with the in situ SW data. The injected poloidal flux produces an electromotive force (EMF) that accelerates particles to Xrayenergies. The predicted temporal profile of the EMF given by the bestfit solution to the observed CME data is found to closely coincide with that of the associated solar flare Xray intensity (GOES 18 A data). LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT: URL:http://www.pppl.gov/Colloquium_Schedule_2010-2011.html END:VEVENT BEGIN:VEVENT UID:13033998002221f62905133f8b1d345173c75e61ec@sns.ias.edu DTSTART:20110421T153000Z DTEND:20110421T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - UPDATED, "Observations of Quasar Feedback" (Nadia Zakamska, Johns Hopkins University) DESCRIPTION:Black hole feedback -- the strong interaction between the energy output of supermassive black holes and their surrounding environments -- is routinely invoked to explain the absence of overly luminous galaxies, theobserved high temperatures of intracluster medium and the black hole / bulge correlations. I will review the theoretical basis of this phenomenon, existing observational evidence for feedback in various typesof active galaxies and present recent observations of our group illustrating black hole feedback in action. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130341780019d25b36a30fd9fc76f57fb4b4c2dfdb@sns.ias.edu DTSTART:20110421T203000Z DTEND:20110421T213000Z SUMMARY:Princeton University Department of Physics Colloquium - TITLE ADDED, "In Hot Pursuit of Dark Matter with XENON100" (Elena Aprile, Columbia University) DESCRIPTION:ABSTRACT: The XENON100 experiment is designed to search for interactions of Dark Matter Weakly Interacting Massive Particles (WIMPs) in a liquid xenon time projection chamber. Featuring a large target mass and an extremely low background, XENON100 is the most sensitive dark matter direct detection experiment in operation today. Located deep underground at the Gran Sasso National Laboratory, in Italy, XENON100 has recently reported results on the elastic scattering of dark matter WIMPs with nucleons, based on 100 days of data acquired in 2010. The recent findings, the status of the experiment and the work towards the next generation XENON1T experiment will be presented. LOCATION:Jadwin Hall, Room A10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13034880009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110422T160000Z DTEND:20110422T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Journal Discussion" (Tom Essinger-Hileman, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13034880006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110422T160000Z DTEND:20110422T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (John Appel, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13034880001f1021317184b4ec2313aef4c3ac4b12@sns.ias.edu DTSTART:20110422T160000Z DTEND:20110422T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 - SPEAKER CHANGED, "Journal Discussion" (Theodor Brasoveanu, Princeton University Physics) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303489800a2ab91954be54c44daa917ba90b0d1a3@sns.ias.edu DTSTART:20110422T163000Z DTEND:20110422T173000Z SUMMARY:Princeton University Astroplasmas Seminar - ADDED, "Multifluid MHD in Weakly Ionized Plasmas" (Turlough Downes, Dublin City University & Dublin Institute for Advanced Studies) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303747200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110425T160000Z DTEND:20110425T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303749000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110425T163000Z DTEND:20110425T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130375350046c7ec5a2389fee75907707da1f496cc@sns.ias.edu DTSTART:20110425T174500Z DTEND:20110425T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - TITLE UPDATED, "Forming Realistic Late-Type Spirals in a LCDM Universe: The Eris Simulation" (Reina Reyes, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here's the topic and paper: "Forming Spiral Galaxies in Simulations" at http://arxiv.org/abs/1103.6030 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1103.6030 END:VEVENT BEGIN:VEVENT UID:130383000081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110426T150000Z DTEND:20110426T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Defending Planet Earth Against Cosmic Intruders" (Irwin Shapiro, Harvard University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1303835400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110426T163000Z DTEND:20110426T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130384890039a59f2ea4b62345e243fd7e6786d0d9@sns.ias.edu DTSTART:20110426T201500Z DTEND:20110426T211500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia, "Alpha Disks, the Magnetorotational Instability, and Beyond..." (Steven A. Balbus, Ecole Normale Superieure de Paris) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 4:00 pm, seminar is at 4:15 pm. ABSTRACT: The development of a standard model for accretion disks in 1973 by Shakura and Sunyaev was a landmark development in theoretical astrophysics. Known as the "alpha disk model" from an important parameter in the theory, the theory has been applied to systems as diverse a star formation regions, binary stars, and active galactic nuclei. A critical, but at the timeunproven, assumption of alpha disk theory was that a gaseous fluid in rotation about central point mass would become turbulent. The proof of this assumption posed a stern challenge to theorists that was met in 1991 with the discovery of the magnetorotational instability (MRI)in accretion disks. In this talk, I will review the essentials of alpha disk theory, present the physics underlying the MRI, and explain how MHD phenomena have influenced our understanding of astrophysical gasdynamics beyond accretion disk theory. LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT: URL:http://www.pppl.gov/colloquia.cfm END:VEVENT BEGIN:VEVENT UID:1303849800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110426T203000Z DTEND:20110426T213000Z SUMMARY:Princeton University Astronomy Colloquium, "A New Mechanism for "Prompt" Ia Supernovae and Compact Object Mergers" (Todd Thompson, The Ohio State University) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13039128007eba1b502f204888691057e7cbd783bb@sns.ias.edu DTSTART:20110427T140000Z DTEND:20110427T210000Z SUMMARY:Princeton Center for Theoretical Science Dark Matter Workshop, "Dark Matter" (Group Discussion) DESCRIPTION:The workshop is intended as an opportunity for experimentalists and theorists to discuss the implications of the recently published dark matter limits of the Xenon100 experiment. All are welcome to attend. Lunch will be provided, so please RSVP to Mariangela Lisanti, PCTS (mlisanti@princeton.edu) if you plan to come and will be staying for lunch. Preliminary Schedule:9:30 - 10:00 : Coffee 10:00 - 12:30 : Overview of Xenon100 results, Overview of CDMS results12:30 - 1:30 : Lunch1:30 - 3:30 : Can current direct detection anomalies be reconciled? (Experimental and theoretical considerations)3:30 - 4:00 : Coffee break4:00 - 5:00 : Implications for LHC experiments LOCATION:PCTS, 4th floor, Jadwin Hall COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13039218001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110427T163000Z DTEND:20110427T173000Z SUMMARY:Princeton University Wunch Talk, "Magnetized Thin Disk Accretion onto Black Holes" (Robert Penna, Harvard University) DESCRIPTION:ABSTRACT: A model for thin disk accretion is an essential ingredient in black hole spin measurements. However, the standard model does not include magnetic fields, which has caused some concern. Using state-of-the-art simulations, I study thin, magnetized accretion disks in the Kerr metric. Magnetic stresses develop in the inner regions of the disk but tend to be advected into the black hole rather than dissipated, and so deviations from standard disk theory predictions are modest. Corrections to spin estimates are computed and shown to be smaller than current observational errors. I develop an analytical extension of the standard disk theory that allows for small stresses at the inner edge of the disk. Accretion efficiencies predicted by the generalized model agree well with the simulations. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304004600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110428T153000Z DTEND:20110428T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Did Star-Forming Galaxies Reionize the Universe?" (Brant Robertson, California Institute of Technology) DESCRIPTION:ABSTRACT: Star-forming galaxies represent a valuable tracer of cosmic history. Recent observational progress with the Hubble Space Telescope has led to the discovery and study of the earliest-known galaxies at a timewhen the universe was only ~800 million years old. Intense ultraviolet radiation from these early galaxies probably induced a major event in cosmic history: the reionization of intergalactic hydrogen. In this talkI will briefly review the status of HST observations of distant star-forming galaxies, and focus on current theoretical challenges in interpreting the data and understanding the connection between these distant galaxies and the process of cosmic reionization. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13040352007d8e74aff46e26ee6c1767b95eac18b7@sns.ias.edu DTSTART:20110429T000000Z DTEND:20110429T020000Z SUMMARY:Princeton University Department of Physics Raymond and Beverly Sackler Lecture in Astrophysics - NOTE START TIME, "Exploring the Warped Side of the Universe" (Nergis Mavalvala) DESCRIPTION:ABSTRACT: Some of the most violent events in the Universe are accompanied by spectacular warpages of space-time that travel to us in the form of gravitational waves. I will describe how we search for these space-time ripples with the goal of observing the Universe with a new sense entirely. Then, surprisingly, I will link our quest to detect gravitational radiation to the bizarre world of quantum mechanics. thus connecting some of the largest scales of exploration to the some of the smallest. Join me on a journey from the far reaches of the Universe to the subatomic world. LOCATION:McDonnell Hall, Room A02 - NOTE LOCATION COMMENT:Talk is Open to the Public URL: END:VEVENT BEGIN:VEVENT UID:13040928009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110429T160000Z DTEND:20110429T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Journal Discussion" (Guilherme Pimentel, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13040928006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110429T160000Z DTEND:20110429T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Alexandra Rahlin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304092800d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110429T160000Z DTEND:20110429T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (Jon Gudmundsson, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304100000277ba0d29cd4da2367df7d12b8c292a3@sns.ias.edu DTSTART:20110429T180000Z DTEND:20110429T190000Z SUMMARY:Princeton University Astrophysical Sciences 2011 Spitzer Lecture Series - Lecture 1 - ADDED, "Surprises in Astrophysical Gasdynamics - Cold Clouds in Hot Gas: the Surprisingly Subtle Thermal Behavior of Conducting and Cooling Plasmas" (Steven A. Balbus, Ecole Normale Superieure de Paris) DESCRIPTION:Surprises in Astrophysical Gasdynamics - About 30 years ago, Princeton University Press published a fascinating book by Sir Rudolf Peierls, entitled Surprises in Theoretical Physics. In the inside cover description it is stated that Problems in theoretical physics often lead to paradoxical answers; yet closer reasoning and a more complete analysis invariably lead to a resolution of the paradox and to a deeper understanding of the physics involved. I was much taken by this book as a student, and looking back now at my own ensuing efforts, I think that many problems from my own research in astrophysical gasdynamics have some of this character. In this series of lectures I will share what I hope will be some simple and revealing examples, taken from hydrodynamics, thermodynamics, and magnetohydrodynamics. They will be drawn mostly, but not exclusively, from my own work. All the problems surprised me for one reason or another--a few seemed genuinely paradoxical -- and forced me to shift my way of thinking about the astrophysical behavior of the system at hand. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304353800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110502T163000Z DTEND:20110502T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130435830013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110502T174500Z DTEND:20110502T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "XUV Disks Show Red Galaxies Sliding Back into the Green Valley!" (Stephanie Tonnesen - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Here is link to the paper to be discussed: http://lanl.arxiv.org/abs/1104.4501 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://lanl.arxiv.org/abs/1104.4501 END:VEVENT BEGIN:VEVENT UID:1304440200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110503T163000Z DTEND:20110503T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304454600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20110503T203000Z DTEND:20110503T213000Z SUMMARY:Princeton University Astronomy Colloquium, "A Surprisingly Simple Model for Solar Rotation" (Steve Balbus, Princeton University) DESCRIPTION:ABSTRACT: Helioseismology has become a precision tool that has allowed the inner rotation pattern of the Sun to be elucidated. While the radiative zone is well-modeled by solid body rotation, the turbulent convective zone shows a regular pattern of differential rotation. Surfaces of constant angular velocity are, roughly speaking, poleward-opening cones, coaxial with the rotation axis. In this talk, I will show how a few simple physical ideas and mathematical techniques are able to reproduce these observations with surprising fidelity. The inner and outer boundaries of the convective zone exhibit strong deviations from the conical pattern; these anomalies offer valuable clues to the stresses that are present in these regions. If correct, the principles of the theory should be applicable to a wide class of stars, including those with fully convective envelopes, and (more speculatively) to the internal rotational dynamics of convective planets. LOCATION:Peyton Hall Auditorium COMMENT:2011 Spitzer Lecturer URL: END:VEVENT BEGIN:VEVENT UID:1304513100df85298300ab29f815c724eb62f987af@sns.ias.edu DTSTART:20110504T124500Z DTEND:20110504T204500Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Seismology of Earth and Stars - Day 1, "Helioseismology" (Various - See Website) DESCRIPTION:Program Organizers: Shravan Hanasoge, Yang Luo & Jeroen Tromp. The idea of using waves to probe the optically invisible interiors of objects has proven to be highly successful in determining the structure of widely different media such as earth, Sun, and with the advent of astro-seismology, a vast spectrum of stars. Despite the disparate paths these fields have taken, exacerbated by the few opportunities for interdisciplinary conference, a surprising degree of unity in the ideas and techniques still persists. In particular, the direct analogy between ambient noise tomography of the earth and helioseismology has allowed the development of mutually beneficial ideas. In light of recent progress in these areas, the proposed workshops are not only timely but may lead to the emergence of novel ideas and new collaborations. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT:Banquet is at 6:30 pm URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:13045266001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110504T163000Z DTEND:20110504T173000Z SUMMARY:Princeton University Wunch Talk, "Direct CO2 Capture from Air Using Moisture Swing Absorption" (Klaus Lackner, Columbia University) DESCRIPTION:ABSTRACT: Direct capture of carbon dioxide from air offers powerful options for managing carbon dioxide emissions on a global scale. However, capture from dilute gas streams poses its own and unique set of challenges. I will present a novel approach to absorbing carbon dioxide from the air, which could form the basis of an economically viable implementation of direct capture of carbon dioxide from air. Certain anionic exchange resins are capable of absorbing carbon dioxide from ambient dry air and they release the carbon dioxide again when exposed to moisture, either in the form of elevated humidity or exposure to liquid water. In this talk, I will outline possible implementations of a humidity driven capture cycle. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13046004004154c0a6f1a1f1a6b5e57f0a180bacfd@sns.ias.edu DTSTART:20110505T130000Z DTEND:20110505T220000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Seismology of Earth and Stars - Day 2, "Helioseismology" (Various - See Website) DESCRIPTION:Program Organizers: Shravan Hanasoge, Yang Luo & Jeroen Tromp. The idea of using waves to probe the optically invisible interiors of objects has proven to be highly successful in determining the structure of widely different media such as earth, Sun, and with the advent of astro-seismology, a vast spectrum of stars. Despite the disparate paths these fields have taken, exacerbated by the few opportunities for interdisciplinary conference, a surprising degree of unity in the ideas and techniques still persists. In particular, the direct analogy between ambient noise tomography of the earth and helioseismology has allowed the development of mutually beneficial ideas. In light of recent progress in these areas, the proposed workshops are not only timely but may lead to the emergence of novel ideas and new collaborations. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT:See website for registration information. URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:1304609400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110505T153000Z DTEND:20110505T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Location, Location, Location! Pair Interactions Versus Environment: Effects on Galaxy Evolution" (Stephanie Tonnesen, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130462560032405c0d8693bc855b6161364087e712@sns.ias.edu DTSTART:20110505T200000Z DTEND:20110505T210000Z SUMMARY:Princeton University Astrophysics Special Seminar, "On the Role of Episodic Accretion in Star Formation" (Stella Offners, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:ABSTRACT: A number of young stars, like FU Orionis, have been observed to experience short abrupt changes in their luminosity of an order of magnitude or more. These changes are commonly attributed to episodic fluctuations inthe accretion rate onto the star. However, the haracteristics, frequency and importance of these bursts in the star formation process remain controversial. Recently, episodic accretion has been proposed as the origin of the stellar age spread inferred in young clusters and also as asolution for the protostellar "luminosity problem," wherein protostars are observed to be dimmer than predicted by star formation theory. In this talk, I give an overview of each of these issues and assess whether episodic accretion could supply a solution. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304686800c5ac8a75286fe07f99b313e4a01aefc2@sns.ias.edu DTSTART:20110506T130000Z DTEND:20110506T200000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Seismology of Earth and Stars - Day 3, "Inverse Methods" (Various - See Website) DESCRIPTION:Program Organizers: Shravan Hanasoge, Yang Luo & Jeroen Tromp. The idea of using waves to probe the optically invisible interiors of objects has proven to be highly successful in determining the structure of widely different media such as earth, Sun, and with the advent of astro-seismology, a vast spectrum of stars. Despite the disparate paths these fields have taken, exacerbated by the few opportunities for interdisciplinary conference, a surprising degree of unity in the ideas and techniques still persists. In particular, the direct analogy between ambient noise tomography of the earth and helioseismology has allowed the development of mutually beneficial ideas. In light of recent progress in these areas, the proposed workshops are not only timely but may lead to the emergence of novel ideas and new collaborations. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT:See website for registration information. URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:13046976009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20110506T160000Z DTEND:20110506T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "Journal Discussion" (William East, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13046976006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20110506T160000Z DTEND:20110506T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304697600d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20110506T160000Z DTEND:20110506T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (BingKan Xue, Princeton University) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13049451004cfe98a85356e76f3b9c971b7c82894e@sns.ias.edu DTSTART:20110509T124500Z DTEND:20110509T213000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Differential Rotation in Stars - Day 1, "Helioseismic Probing of the Solar Internal Rotation & Solar and Stellar Differential Rotation" (Various - See Website) DESCRIPTION:Program Organizers: Steven Balbus, Mark Miesch, James Stone, Nigel Weiss. The importance of understanding how and why stars acquire differential rotation manifests itself in many ways. The convergence of helioseismology results of the space-based Solar and Heliospheric Observatory (SOHO) and terrestrial Global Oscillation Network Group (GONG) has provided hydrodynamicists with a unique oppportunity: the internal rotation velocity of a turbulent, spinning fluid is now known with great accuracy. In this multi-disciplinary meeting, observers, numericists, and theorists will be brought together for intense discussion and the generation of new ideas. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:13049532004a89c4e4aa308f7d00c29243371142d1@sns.ias.edu DTSTART:20110509T150000Z DTEND:20110509T160000Z SUMMARY:Princeton University Gravity and Cosmology Group Special Seminar, "Gravitational Wave Astrophysics With Compact Binaries" (Ilya Mandel, Massachusetts Institute of Technology) DESCRIPTION:ABSTRACT: The ground-based gravitational-wave telescopes LIGO and Virgo approach the era of first detections. In this talk, I will review the current knowledge of the coalescence rates and parameter distributions of merging neutron-star and black-hole binaries. I emphasize the bi-directional connection between gravitational-wave astronomy and conventional astrophysics. Astrophysical input will make possible informed decisions about optimal detector configurations and search techniques. Meanwhile, rate upper limits, detected merger rates, and the distribution of masses and spins measured by gravitational-wave searches will constrain astrophysical parameters through comparisons with astrophysical models. I report on ongoing efforts to develop a framework for converting gravitational-wave observations into improved constraints on astrophysical parameters and discuss future developments necessary to the success of gravitational-wave astronomy. LOCATION:Jadwin Hall, Room 343 - NOTE LOCATION COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304956800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110509T160000Z DTEND:20110509T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1304958600a9d850b971d7ffb0b1c2a58393c5f8fb@sns.ias.edu DTSTART:20110509T163000Z DTEND:20110509T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - TOPIC UPDATED, "Discussion of Ways to Get Around Cosmic Variance" (Kendrick Smith, Daniel Grin, Princeton University and Institute for Advanced Study, respectively) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. TOPIC: This week we will have a discussion of a variety of ways recently proposed to get around the age-old bugaboo of cosmic variance. Here are some relevant manuscripts:1) arXiv:1104.3862 [pdf, ps, other], "Cosmology without cosmic variance," Gary M. Bernstein, Yan-Chuan Cai, comments: 9 pages, 3 figures, subjects: cosmology and extragalactic astrophysics (astro-ph.CO); (2) arXiv:1104.2321 [pdf, ps, other], "Optimal Constraints on Local Primordial Non-Gaussianity from the Two-Point Statistics of Large-Scale Structure," Nico Hamaus, Uros Seljak, Vincent Desjacques; (3) arXiv:0807.1770 [pdf, ps, other], "Measuring primordial non-gaussianity without cosmic variance, " Uros Seljak, comments: 7 pages,Journal-ref: Phys.Rev.Lett.102:021302,2009, subjects: astrophysics (astro-ph); and (4) arXiv:0810.0323 [pdf, ps, other], "How to measure redshift-space distortions without sample variance," Patrick McDonald, Uros Seljak, comments: 22 pages, 13 figures, subjects: astrophysics (astro-ph). LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://arxiv.org/abs/1104.3862 END:VEVENT BEGIN:VEVENT UID:1304962200bc1b877de5e335352538412dcbf1b261@sns.ias.edu DTSTART:20110509T173000Z DTEND:20110509T183000Z SUMMARY:Princeton University Particle and Nuclear Astrophysics Special Seminar - ADDED, "Searching for Sterile Neutrinos with (Anti)Neutrino Sources in Borexino" (Aldo Ianni, Laboratori Nazionali del Gran Sasso) DESCRIPTION:ABSTRACT: At present a standard paradigm of neutrino physics has been established from data collected by a number of experiments which have detected neutrinos from the sun, from cosmic ray showers in the atmosphere, from reactors and from accelerators. The data are well fitted in the framework of a three-neutrino mixing oscillations with two squared-mass differences. Borexino at the Gran Sasso Laboratory (Italy) has recently improved the overall picture by a precise measurement of 7Be solar neutrinos. The above paradigm, however, cannot accomodate some experimental findings: LSND/MiniBooNE, reactor anomaly and Gallium anomaly. As a matter of fact, these anomalies/hints could be explained by additional sterile neutrinos with masses in theeV scale. Moreover, precision cosmology, through observations of the cosmic microwave background and large scale structures, and big-bang nucleosynthesis are sensitive to the number of relativistic degrees of freedom in the early Universe. Recent data seems to favour a larger number of relativistic light neutrinos than what predicted by the standard model, namely N? = 3.046. In this framework we propose to make use of an intense (anti)neutrino source in Borexino to probe oscillation lengths on the scale of 1m. PBq sources have been already used in the past with the purpose to calibrate radiochemical solar neutrinodetectors. The low background, high energy resolution and good vertex reconstruction of Borexino allow to search for the oscillation pattern due to a possible eV sterileneutrino in a disappearance experiment. In the talk details on the neutrino source experiments in Borexino and its sensitivity to probe eV sterile neutrinos will be presented. LOCATION:Jadwin Hall, A-06 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130496310013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110509T174500Z DTEND:20110509T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Redshift Evolution of AGN Bias" (Richard Cool - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. I'd like to discuss a recent paper from astro-ph on AGN clustering, "The XMM-Newton Wide field survey in the COSMOS field: redshift evolution of AGN bias and subdominant role of mergers in triggering moderate luminosity AGN at redshift up to 2.2," V. Allevato et al, at: http://arxiv.org/abs/1105.0520 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1105.0520 END:VEVENT BEGIN:VEVENT UID:13050324006cf62b83b931cd1bfb58c9320df3ada2@sns.ias.edu DTSTART:20110510T130000Z DTEND:20110510T213000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Differential Rotation in Stars - Day 2, "Solar and Stellar Differential Rotation (continued) & Convection in Rotating Fluids" (Various - See Website) DESCRIPTION:Program Organizers: Steven Balbus, Mark Miesch, James Stone, Nigel Weiss. The importance of understanding how and why stars acquire differential rotation manifests itself in many ways. The convergence of helioseismology results of the space-based Solar and Heliospheric Observatory (SOHO) and terrestrial Global Oscillation Network Group (GONG) has provided hydrodynamicists with a unique oppportunity: the internal rotation velocity of a turbulent, spinning fluid is now known with great accuracy. In this multi-disciplinary meeting, observers, numericists, and theorists will be brought together for intense discussion and the generation of new ideas. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:130503960081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110510T150000Z DTEND:20110510T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Shear-driven Turbulence on Earth and in Space" (Jeremy Goodman, Princeton University) DESCRIPTION:ABSTRACT: Motivated by astronomical accretion disks in which magnetorotational instability (MRI) may be locally or episodically suppressed, such as protostellar disks, recent laboratory experiments have studied hydrodynamic turbulence in rotating shear flows at Reynolds numbers (Re) above one million. Positive radial angular-momentum gradients are found to inhibit turbulence, but to a degree that is disputed among experimenters, and it is not agreed whether hydrodynamic turbulence is possible for keplerian flow profiles. Numerical simulations, which better control boundary conditions but have been limited to lower Re, find strong inhibition. Complicating matters is the discovery that turbulence is transient, both numerically and experimentally, absent linear instabilities or forcing. Turbulent half-lives increase with Re, but there is no sharp threshold separating persistently laminar from persistently turbulent states. Transience is also seen in some zero-net-flux MRI simulations. One avenue for progress may have been opened by the discovery of self-sustainingnonlinear structures near turbulent "transition" in plane-Couette, pipe, and perhaps shearing-box flow. These matterswill be reviewed, and preliminary results from a new suite of higher-Re shearing-box simulations will be presented. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305045000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110510T163000Z DTEND:20110510T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130505400030644898170a36a832896291a8a0b830@sns.ias.edu DTSTART:20110510T190000Z DTEND:20110510T200000Z SUMMARY:Princeton University Astroparticle Physics Special Seminar - ADDED, "The LUX and LZ Dark Matter Experiments" (Thomas Shutt, Department of Physics, Case Western Reserve University) DESCRIPTION:ABSTRACT: Recent advances in detectors based on liquefied noble ele-ments promise a radical increase in the sensitivity of searches for WIMP dark matter, and should allow a nearly complete test of supersymmetric dark matter over the next decade or more. Such efforts are complementary to the LHC. The LUX experi-ment is deploying a detector featuring 300 kg of two-phase Xe in the location of Ray Davis' original solar neutrino experiment in the Homestake mine in South Dakota. I will discuss both LUX and proposed follow-on 1.5 and 20 ton experiments by the LZ collaboration. The 20 ton LZ experiment would be an ulti-mate direct dark matter detection experiment, closing the avail-able WIMP search window on Earth that is limited by the signal from coherent scattering of astrophysical neutrinos. LOCATION:Jadwin Hall, Room A-06 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130511880074eec8e1b5c0ec565cf692af271b2b69@sns.ias.edu DTSTART:20110511T130000Z DTEND:20110511T163000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Differential Rotation in Stars - Day 3, "Convection in Rotating Fluids (continued) & The Near Surface Shear Layer" (Various - See Website) DESCRIPTION:Program Organizers: Steven Balbus, Mark Miesch, James Stone, Nigel Weiss. The importance of understanding how and why stars acquire differential rotation manifests itself in many ways. The convergence of helioseismology results of the space-based Solar and Heliospheric Observatory (SOHO) and terrestrial Global Oscillation Network Group (GONG) has provided hydrodynamicists with a unique oppportunity: the internal rotation velocity of a turbulent, spinning fluid is now known with great accuracy. In this multi-disciplinary meeting, observers, numericists, and theorists will be brought together for intense discussion and the generation of new ideas. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:13051314001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110511T163000Z DTEND:20110511T173000Z SUMMARY:Princeton University Wunch Talk, "Improved Model of Spinning Dust Emission and Implications to Anomalous Microwave Emission in CMB Foregrounds" (Thiem Hoang, The University of Wisconsin - Madison) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305205200eea1d3e7b0dbe5e3a3bbf834ecad0050@sns.ias.edu DTSTART:20110512T130000Z DTEND:20110512T213000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Differential Rotation in Stars - Day 4, "Tachocline: Dynamics & Tachocline: Confinement" (Various - See Website) DESCRIPTION:Program Organizers: Steven Balbus, Mark Miesch, James Stone, Nigel Weiss. The importance of understanding how and why stars acquire differential rotation manifests itself in many ways. The convergence of helioseismology results of the space-based Solar and Heliospheric Observatory (SOHO) and terrestrial Global Oscillation Network Group (GONG) has provided hydrodynamicists with a unique oppportunity: the internal rotation velocity of a turbulent, spinning fluid is now known with great accuracy. In this multi-disciplinary meeting, observers, numericists, and theorists will be brought together for intense discussion and the generation of new ideas. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT:Dinner begins at 7 pm this evening. URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:1305214200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110512T153000Z DTEND:20110512T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Exoplanetary Atmospheres" (Kristen Menou, Columbia University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305291600b8647195b5c1cb35b952a976fbdbd439@sns.ias.edu DTSTART:20110513T130000Z DTEND:20110513T160000Z SUMMARY:Princeton University Princeton Center for Theoretical Science - Differential Rotation in Stars - Day 5, "Tachocline (continued)" (Various - See Website) DESCRIPTION:Program Organizers: Steven Balbus, Mark Miesch, James Stone, Nigel Weiss. The importance of understanding how and why stars acquire differential rotation manifests itself in many ways. The convergence of helioseismology results of the space-based Solar and Heliospheric Observatory (SOHO) and terrestrial Global Oscillation Network Group (GONG) has provided hydrodynamicists with a unique oppportunity: the internal rotation velocity of a turbulent, spinning fluid is now known with great accuracy. In this multi-disciplinary meeting, observers, numericists, and theorists will be brought together for intense discussion and the generation of new ideas. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pcts.princeton.edu/pcts/seismo/seismo.html END:VEVENT BEGIN:VEVENT UID:1305297900ac3575e3ba4f5eeb6ecc753da470314b@sns.ias.edu DTSTART:20110513T144500Z DTEND:20110513T154500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Theory Department Seminars - NOTE DAY, TIME & LOCATION, "Rapid Evaluation of the Fokker-Planck Collision Operator*" (Andras Pataki, Courant Institute of Mathematical Sciences (CIMS), New York University) DESCRIPTION:Any non-PPPL people interested in attending should see the link (below) for more information. ABSTRACT: The Fokker-Planck equation, which describes the evolution of the plasma over time, has a nonlinear term representing the collisions of various species of the plasma. Current plasma edge simulations do not take this collision effect into account, because of the difficulties in the accurate evaluation of this term. Using the Rosenbluth potential formalism, the collision operator can be written in terms of solutions of a Poisson and a biharmonic freespace PDE. Due to the inherent axisymmetry of the input data, cylindrical coordinate solvers are preferred for efficient computation. Standard numerical techniques (based typically on finite differences and finite elementapproximations) encounter difficulties in achieving high order accuracy, especially in the computation of derivatives of the solution (required in the collision operator formulation), and in imposing radiation conditions atinfinity. Our new solver achieves arbitrary order accuracy in cylindrical coordinates based on a combination of separation of variables, Fourier analysis and the careful solution of the resulting radial ODE. A weak singularity arises in the the continuous Fourier transform of the solution that can be handled effectively with special purpose quadrature rules and spectral accuracy can beachieved in derivatives without loss of precision. LOCATION:PPPL, Forrestal Campus, Theory Seminar Room, Room T169, COMMENT:*This is joint work with Prof. Leslie Greengard, Director CIMS, New York University URL:http://www.pppl.gov/visiting.cfm END:VEVENT BEGIN:VEVENT UID:1305563400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110516T163000Z DTEND:20110516T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305568800b78b8c3de1adbaa0af2ccf028f0571b0@sns.ias.edu DTSTART:20110516T180000Z DTEND:20110516T190000Z SUMMARY:Princeton University Astrophysical Sciences 2011 Spitzer Lecture Series - Lecture 2, "Surprises in Astrophysical Gasdynamics -The Endlessly Surprising Magnetorotational Instability" (Steven A. Balbus, Ecole Normale Superieure de Paris) DESCRIPTION:About 30 years ago, Princeton University Press published a fascinating book by Sir Rudolf Peierls, entitled Surprises in Theoretical Physics. In the inside cover description it is stated that Problems in theoretical physics often lead to paradoxical answers; yet closer reasoning and a more complete analysis invariably lead to a resolution of the paradox and to a deeper understanding of the physics involved. I was much taken by this book as a student, and looking back now at my own ensuing efforts, I think that many problems from my own research in astrophysical gasdynamics have some of this character. In this series of lectures I will share what I hope will be some simple and revealing examples, taken from hydrodynamics, thermodynamics, and magnetohydrodynamics. They will be drawn mostly, but not exclusively, from my own work. All the problems surprised me for one reason or another--a few seemed genuinely paradoxical -- and forced me to shift my way of thinking about the astrophysical behavior of the system at hand. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130564440081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110517T150000Z DTEND:20110517T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Direct Imaging of Terrestrial Exoplanets: Approaches and Progress in High-Contrast Imaging from Space" (Jeremy Kasdin, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305649800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110517T163000Z DTEND:20110517T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305734400ed68699fbe278304e33288aa18f8362f@sns.ias.edu DTSTART:20110518T160000Z DTEND:20110518T170000Z SUMMARY:Princeton University Wunch Talk - TIME CHANGED TO NOON, "Cosmology and Astrophysics with Galaxy Clusters" (Daisuke Nagai, Yale University) DESCRIPTION:ABSTRACT: Recent years have witnessed the emergence of galaxy clusters as powerful laboratories for cosmology and astrophysics. Being the largest and most magnificent structures in the Universe, clusters of galaxies serve as excellent tracers of the growth of cosmic structures. Coupled with sophisticated numerical models, the current generation of cluster surveys have provided independent confirmation of the cosmic acceleration and significantly tighten constraints on the nature of dark matter and dark energy. A number of new surveys are underway to test our understanding of the structure formation and fundamental physics of the cosmos. In this talk, I will review recent advances in this rapidly developing field and discuss emerging frontiers at the crossroads of cosmology and astrophysics. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305741600660eb1635f45a6ea4beb50a560891fbe@sns.ias.edu DTSTART:20110518T180000Z DTEND:20110518T190000Z SUMMARY:Princeton University Astrophysical Sciences 2011 Spitzer Lecture Series - Lecture 3, "Surprises in Astrophysical Gasdynamics -Thermal Redux: the Surprising Obstinance of the Cooling Flow Problem" (Steven A. Balbus, Ecole Normale Superieure de Paris) DESCRIPTION:About 30 years ago, Princeton University Press published a fascinating book by Sir Rudolf Peierls, entitled Surprises in Theoretical Physics. In the inside cover description it is stated that Problems in theoretical physics often lead to paradoxical answers; yet closer reasoning and a more complete analysis invariably lead to a resolution of the paradox and to a deeper understanding of the physics involved. I was much taken by this book as a student, and looking back now at my own ensuing efforts, I think that many problems from my own research in astrophysical gasdynamics have some of this character. In this series of lectures I will share what I hope will be some simple and revealing examples, taken from hydrodynamics, thermodynamics, and magnetohydrodynamics. They will be drawn mostly, but not exclusively, from my own work. All the problems surprised me for one reason or another--a few seemed genuinely paradoxical -- and forced me to shift my way of thinking about the astrophysical behavior of the system at hand. LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1305819000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110519T153000Z DTEND:20110519T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Deuterium-Burning Mass Limit, and Problems with the TiO Hypothesis" (Dave Spiegel, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1306166400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110523T160000Z DTEND:20110523T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held bi-weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1306168200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110523T163000Z DTEND:20110523T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130617270013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110523T174500Z DTEND:20110523T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Galaxy Evolution and Environment" (Renye Cen - Discussion Leader, Princeton University) DESCRIPTION:Richard Cool and Claire Lackner are the organizers. Renyue will talk about his recent paper on Galaxy Evolution and Environment: http://xxx.lanl.gov/abs/1104.5046 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://xxx.lanl.gov/abs/1104.5046 END:VEVENT BEGIN:VEVENT UID:130624920089b3dbe817fb759dd4cfa3f2ae6712a7@sns.ias.edu DTSTART:20110524T150000Z DTEND:20110524T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar - CANCELED DESCRIPTION: LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13063410001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110525T163000Z DTEND:20110525T173000Z SUMMARY:Princeton University Wunch Talk, "Local Thermal Instability in the Intracluster Medium" (Prateek Sharma, University of California, Berkeley) DESCRIPTION:ABSTRACT: The plasma density in cores of galaxy clusters is large enough that the central cooling time is shorter than the cluster age (~Hubble time). Given a short cooling time the cluster cores were expected to cool prodigiously to form stars. However, this was not observed. The lack of star formation and the absence of soft X-ray lines indicate that cooling is largely balanced by some form of heating, most likely due to the central active galactic nuclei (AGN). I will describe the results from our idealized simulations of the ICM where we enforce thermal equilibrium. Since the ICM is locally thermally unstable (because of Field's instability), cold filaments (at thermally stable phases) are expected to condense out of the hot phase. The ICM condenses to the stable phase at ~104 K only when the ratio of the thermal instability timescale and the gravitational free-fall timescale (tcool/tff) is < 10. This criterion quantitatively explains the presence of H_\alpha filaments observed in cool-coreclusters. The infalling cold filaments are expected to power star formation and AGN feedback, thereby maintaining the ICM in thermal balance. I will discuss the implications of local thermal instability on the structure of X-ray plasmas in massive, virialized halos. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1306423800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110526T153000Z DTEND:20110526T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Cosmology with Supernovae: Progress and Prospects" (Saurabh Jha, Rutgers, The State University of New Jersey) DESCRIPTION:ABSTRACT: Type Ia supernovae (SN Ia) are exquisite tools with which to trace the history of cosmic expansion, and they have a starring role in attempts to understand the dark energy that drives our accelerating Universe. Current supernova samples have grown to a size where systematic uncertainties are beginning to dominate statistical ones. Iwill describe the factors that limit the precision of our cosmological inferences and avenues for improvement, with a focus on understanding the reddening of SN Ia (by dust or otherwise) and constraining SN Ia progenitor models through observations of peculiar objects. I willalso discuss new applications of precise distances from SN Ia in current and upcoming surveys. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130651740035432e0ce445923eef3437aa1626a3c7@sns.ias.edu DTSTART:20110527T173000Z DTEND:20110527T183000Z SUMMARY:Institute for Advance Study/Princeton University High Energy Theory Seminar - ADDED, "Black Holes with Only One Symmetry" (Gary Horowitz, University of California, Santa Barbara) DESCRIPTION: LOCATION:Institute for Advanced Study, Bloomberg Hall Lecture Hall COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307018700947429f3508e9b16622238126a6397ab@sns.ias.edu DTSTART:20110602T124500Z DTEND:20110602T221500Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) and the Department of Physics 14th Eastern Gravity Meeting - Day 1 (Various - See Website) DESCRIPTION:The 14th Eastern Gravity Meeting will be hosted by the Princeton Center forTheoretical Science (PCTS) and Department of Physics, at Princeton University. People working in all areas of gravitational physics, including theory, experiment, observation, classical and quantum gravity are encouraged to attend. Being a regional meeting, most participants will be from the east coast of North America, though all are welcome. People who wish to give a short presentation should fill out the relevant part of the registration form. The length of each talk will depend on the number of abstracts received, though will probably be 10-15 minutes if there are similar numbers of participants as previous year's meetings. The exact schedule should be available shortly after the registration deadline (May 15). Students are strongly encourage to give a presentation, as the regional meetings are intended to serve as a less formal, and thus hopefully friendlier environment to give a talk than the larger meetings. Also, the best student presentation will receive a $200 award, sponsored by the Topical Group in Gravitation (GGR) of the American Physical Society (APS). LOCATION:Jadwin Hall, Room 407 COMMENT: URL:http://physics.princeton.edu/indico/conferenceDisplay.py?confId=126 END:VEVENT BEGIN:VEVENT UID:1307028600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110602T153000Z DTEND:20110602T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Satellite Supported Estimates of Human Rate of NPP Carbon Use on Land: Challenges Ahead" (Marc Imhoff, Goddard Space Flight Center/National Aeronautics and Space Administration) DESCRIPTION:ABSTRACT: The human demand for products of photosynthesis is a powerful measure of the aggregate impact of human action on the biosphere and indicatorof societal vulnerability to climate change. We show results from several studies that use satellite and statistical data to estimate the amount of Earths net primary production (NPP) on land required to support regional and global use of food, fiber and NPP-based fuel products across a ten-year period. Earths planetary NPP supply was> estimated using AVHRR vegetation index and MODIS derived NPP products to establish a baseline extending from 1982 2005. NPP carbon demand was estimated by applying biophysical models to consumption data from the UN Food and Agriculture Organization to calculate the annual amount of NPP required for the products consumed. Results show that globally, humans consume more than 20% of Earths total net primary production on land and that both populations and per capita consumption increased between 1995 and 2005. Regionally, the NPP-carbon balance percentage varies from 6% to over 70% and locally from near 0% to over 30,000% in major urban areas. Large uncertainties exist in both supply and demand calculations but while the supply trend varies in sign demand continues to rise. Scenarios modeling the impact of per capita consumption, population growth, and technology suggest that NPP demand as percent of supply is likely to increase substantially in the next 40 years despite better harvesting and processing efficiencies. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307106000b96d32fb8a70dd7f1d9a4fda11ae222c@sns.ias.edu DTSTART:20110603T130000Z DTEND:20110603T213000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) and the Department of Physics 14th Eastern Gravity Meeting - Day 2 (Various - See Website) DESCRIPTION:The 14th Eastern Gravity Meeting will be hosted by the Princeton Center forTheoretical Science (PCTS) and Department of Physics, at Princeton University. People working in all areas of gravitational physics, including theory, experiment, observation, classical and quantum gravity are encouraged to attend. Being a regional meeting, most participants will be from the east coast of North America, though all are welcome. People who wish to give a short presentation should fill out the relevant part of the registration form. The length of each talk will depend on the number of abstracts received, though will probably be 10-15 minutes if there are similar numbers of participants as previous year's meetings. The exact schedule should be available shortly after the registration deadline (May 15). Students are strongly encourage to give a presentation, as the regional meetings are intended to serve as a less formal, and thus hopefully friendlier environment to give a talk than the larger meetings. Also, the best student presentation will receive a $200 award, sponsored by the Topical Group in Gravitation (GGR) of the American Physical Society (APS). LOCATION:Jadwin Hall, Room 407 COMMENT:Presentation of APS GGR Prize for best student presentation - 5:45 pm URL:http://physics.princeton.edu/indico/conferenceDisplay.py?confId=126 END:VEVENT BEGIN:VEVENT UID:1307118600f419de7d4071453d0b2de0634eca45ee@sns.ias.edu DTSTART:20110603T163000Z DTEND:20110603T173000Z SUMMARY:Princeton University Astroplasmas Seminar, "Reconnection in Naturally Arising Magnetic Fields" (Allen Boozer, Columbia University) DESCRIPTION:ABSTRACT: The fundamental questions of reconnection theory are why is the observed dissipation of the magnetic field sometimes enhanced by ten or twenty orders of magnitude from its characteristic value and what is the trigger for the enhanced dissipation. Electrodynamics provides an answer - the exponential increase in the separation between neighboring magnetic field lines. In toroidal magnetic configurations with small islands this exponentiation occurs only near the X-points of the islands, though it occurs almost everywhere in regions of stochastic field lines. In naturally occurring magnetic structures X-points and islands are ill defined, but neighboring magnetic field lines generically change their separation by a factor of exp(\sigma) within a segment of the magnetic system of length L. The exponentiation \sigma is easily calculated field-line-by-field-line in any bounded region in which a magnetic field is known - for example in a numerical simulation - and \sigma evolves even when the magnetic evolution is dissipationless. The exponential increase in the separation implies an exponential increase in derivatives across the magnetic field of quantities that vary slowly along the magnetic field lines. Some dissipative mechanisms are proportional to these derivatives squared, so the dissipation becomes exponentially large, proportional to exp(2\sigma). Reconnection is naturally triggered in regions in which \sigma~ 20. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307377800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110606T163000Z DTEND:20110606T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307377800199393520edd53587651b79f54c53e65@sns.ias.edu DTSTART:20110606T163000Z DTEND:20110606T173000Z SUMMARY:Princeton University Special Astroplasmas Seminar, "Phase-Space Cascade in Kinetic Magnetized Plasma Turbulence" (Gabriel Plunk, University of Maryland and Princeton Plasma Physics Laboratory (PPPL)) DESCRIPTION:ABSTRACT: Magnetized weakly collisional plasma turbulence, being described by gyrokinetic theory, can be thought of as turbulence in 5D, the dimension of the particle phase space. This suggests looking at kinetic plasma turbulence through the lens of neutral fluid turbulence theory, but in higher dimensions. Several questions come to mind: What are the relevant nonlinear invariants? Is there a local ``cascade'' of these quantities through an inertial range? What is the role of velocity space in this cascade. In this talk we address these questions for electrostatic turbulence. The picture that emerges is a cascade of perturbed entropy that proceeds simultaneously through velocity and position space, concluding at a collisional scale. The fact that nonlinear interactions in gyrokinetics are in some sense fundamentally two-dimensional leads us to consider a "dual" cascade, which can include both forward and inverse energy transfer. We compare this to the dual cascade of in neutral fluid turbulence, finding both similarities and striking differences. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:130745880089b3dbe817fb759dd4cfa3f2ae6712a7@sns.ias.edu DTSTART:20110607T150000Z DTEND:20110607T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar - CANCELED DESCRIPTION: LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307633400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110609T153000Z DTEND:20110609T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Searching for Binary Supermassive Black Holes: from Tens of kpc to kpc Scales" (Yue Shen, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:ABSTRACT: Binary SMBHs are generic outcomes of hierarchical galaxy mergers. They are of great value in understanding the role of galaxy mergers in AGN fueling and the interplay between SMBHs and their hosts, as well as predictions for future gravitational wave detection experiments. While pervasive in theoretical models, despite decades of searching, binary SMBHs with separations below a few kpc remain extremely difficult to find. In this talk I will discuss ongoing searches for binary SMBHs at various separations, with focuses on our recent work on tens of kpc to kpc-scale binary AGNs selected from SDSS. This is a first step towards quantifying the demographics of low-redshift (z<0.3) binary AGNs on >~kpc scales. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1307982600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110613T163000Z DTEND:20110613T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1308238200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110616T153000Z DTEND:20110616T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Dynamical and Nonthermal Processes in Galaxy Clusters" (Uri Keshet, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:ABSTRACT: Recent observations of galaxy clusters reveal new insights into the dynamical and nonthermal processes in the intracluster medium (ICM). Tangential discontinuities (known as cold fronts) are directly seen in high resolution X-ray maps of cool cluster cores.They reveal bulk shear flows which magnetize the plasma, give rise to radio minihalos, and may play a role in resolving the cooling problem. The ICM shows a rich phenomenology of non-thermal radio emission, arguably arising from hadronic cascades involving cosmic-ray protons. While such a secondary signal is too weak to be observed by Fermi, the primary gamma-ray signal from strong shocks should be identifiable. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1308587400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110620T163000Z DTEND:20110620T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1309192200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110627T163000Z DTEND:20110627T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13094460006e070bd5fd6f3825e130e65b6e48c80b@sns.ias.edu DTSTART:20110630T150000Z DTEND:20110630T160000Z SUMMARY:Institute for Advanced Study Special Astrophysics Talk (Abstract Added), "Several New Observational Signatures of Relativistic Outflows from Dying Stellar Systems" (Ehud Nakar, Tel Aviv University) DESCRIPTION:I will discuss three observational signatures of relativistic outflows from different explosive death scenarios of stellar systems. First, I will present a new analytic model for the propagation of relativistic jets in ambient medium and apply it to the collapsar model for gamma-ray bursts(GRBs). This model predicts a clear signature in the duration distribution of bursts. This signature is seen in the distribution of long GRBs but contradicts the durations of low-luminosity GRBs, suggesting that the two types of bursts are fundamentally different. Second, I will present theory of relativistic shock breakouts. Such breakouts are expected to produce gamma-ray flares, with a specific signature, in white dwarf explosions (e.g., Ia supernovae), extremely energetic supernovae and GRBs. The high-energy emission of all low-luminosity GRBs show this signature, and is most likely generated by relativistic shock breakout. Finally, I will discuss radio remnants, generated by mildly relativistic outflow from the merger of compact binaries, the most promising sources of detectablegravitational wave (GW) signal. These remnants are likely to be detectable weeks after the merger, out to the detection horizon of next generation ground based GW detectors. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1310401800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110711T163000Z DTEND:20110711T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131048280081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110712T150000Z DTEND:20110712T163000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "To be announced" (Chris Hirata, California Institute of Technology) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1311352200f419de7d4071453d0b2de0634eca45ee@sns.ias.edu DTSTART:20110722T163000Z DTEND:20110722T173000Z SUMMARY:Princeton University Astroplasmas Seminar, "Extreme Particle Acceleration in Reconnection Layers and Gamma-ray Flares in the Crab Nebula" (Dmitri Uzdensky, University of Colorado) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1312216200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110801T163000Z DTEND:20110801T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch. A limited lunch menu is available in Harry's Bar in the upper level of the Dining Hall. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1312480800f4e5eea92b6262bbe533b223241ca974@sns.ias.edu DTSTART:20110804T180000Z DTEND:20110804T210000Z SUMMARY:Princeton University Undergraduate Summer Research Program - ADDED, "Student Presentations" (Various) DESCRIPTION: LOCATION:Peyton Hall, Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1312821000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110808T163000Z DTEND:20110808T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1313425800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110815T163000Z DTEND:20110815T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch. A limited lunch menu is available in Harry's Bar in the upper level of the Dining Hall. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1314030600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110822T163000Z DTEND:20110822T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1314203400957c41dfeb7583364658179818c024f5@sns.ias.edu DTSTART:20110824T163000Z DTEND:20110824T173000Z SUMMARY:Princeton University Talk, "Powering short GRBs by mergers of moderately magnetized neutron stars" (Miguel-Angel Aloy, University of Valencia) DESCRIPTION:We explore the implications of the process of formation of low-density funnels of magnetized plasma during the process of merger of two neutron stars with initially low magnetization. In particular, we consider the impact on the production of short gamma-ray bursts that such funnels may probably have. The formation of the aforementioned structures has been considered as a necessary condition to boost ultrarelativistic jets after the formation of a hyperaccreting black hole system. We conclude that thefact that low-density channels are naturally formed from rather generic initial merger conditions suggests that the formation of ultrarelativistic jets can be a genuine feature of mergers of magnetized neutron stars. LOCATION:Princeton University, Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1314635400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110829T163000Z DTEND:20110829T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch. A limited lunch menu is available in Harry's Bar in the upper level of the Dining Hall. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1315845000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110912T163000Z DTEND:20110912T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131584950013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110912T174500Z DTEND:20110912T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Mass and Environment as Drivers of Galaxy Evolution in SDSS and zCOSMOS and the Origin of the Schechter Function" (Claire Lackner, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. Here's a link to the paper to be discussed: http://arxiv.org/abs/1003.4747v1, "Mass and Environment as Drivers of Galaxy Evolution in SDSS and zCOSMOS and the Origin of the Schechter Function," by Peng, Ying-jie, et al. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:1316017800fb51d3058b3e94b0e818edf09837bc05@sns.ias.edu DTSTART:20110914T163000Z DTEND:20110914T173000Z SUMMARY:Princeton University Wunch Talk - Speaker 2 - ADDED, "Smooth, Squashed and Rotating: Not the Stellar Halo We Used to Know" (Alis Deason, Institute of Astronomy, Cambridge) DESCRIPTION:ABSTRACT - The phase-space structure of the stellar halo is intimately linked to the formation history of the Galaxy. In this talk I will discuss the rotation properties and spatial structure of the stellar halo as traced by Blue Horizontal Branch (BHB) stars. Using SDSS spectroscopic data I find an apparent dichotomy between relatively metal-rich and metal-poor stars. I argue that a retrograde signal in the metal-poor stars is due to an underestimate of the Local Standard or Rest while the kinematic signature of the metal-rich stars is linked to a (massive) accretion event. In addition, I introduce a new method to discern BHB stars from Blue Straggler stars using a colour dependent membership probability, thus circumventing the need for spectroscopic data. This new method is applied to a sample of A-type stars selected from the latest SDSS DR8 photometric catalog. I find that the (inner) stellar halo is 'squashed, broken but smooth' and discuss the implications of this result. Finally, I compare these observational results to state-of-the-art cosmological simulations. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:13160178004c60d11ace3046ff7ba7ed56ba186fe6@sns.ias.edu DTSTART:20110914T163000Z DTEND:20110914T173000Z SUMMARY:Princeton University Wunch Talk - Speaker 1 - ADDED, "Finding the First Metals" (Ryan Cooke, University of Cambridge) DESCRIPTION:ABSTRACT - The first metals in our Universe were created and distributed by stars we still know very little about. Before these metals were incorporated in the second generation of stars, they were (presumably) stored within a large reservoir of gas. In this talk, I will present the results from my ongoing survey to search for this `missing link' by targeting near-pristine damped Lyman-alpha systems (DLAs) at z~3. I report the discovery of a few systems that exhibit an abundance pattern inline with model calculations of metal-free nucleosynthesis, including notable enhancements in their C/Fe ratio; such an abundance pattern is akin to the carbon-enhanced metal-poor stars seen in the halo of our Galaxy. For the full sample of DLAs in this survey, I reinvestigate the trends of [C/O] and [O/Fe] with metallicity, and compare my findings to the recent measures of the abundances of C, O, and Fe from Galactic halo stars. I comment on the new insight this has afforded on the nature of the much-debated trends of these ratios when [Fe/H] < -2.0. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1316098800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110915T150000Z DTEND:20110915T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Searching for Redshift ~7 Quasars with UKIDSS" (Daniel Mortlock, Imperial College) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13161888003bfa679004d733190654c82765a6229f@sns.ias.edu DTSTART:20110916T160000Z DTEND:20110916T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - ADDED, "The Status of LISA and Gravitational Wave Astronomy with Massive Black Hole Binaries" (Sean McWilliams, Princeton University Physics) DESCRIPTION:ABSTRACT: I will discuss the rapidly-evolving status of the gravitational wave observatory in space, formerly known as LISA, both in the United States and in Europe. In light of the new cost-cutting redesign, I will present results showing the scientific impact of the redesign for massive black hole binaries. Following the talk, we will have a brief organizational discussion regarding the format of gravity group lunches for this academic year. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:The Friday noon talks are catered by Hoagie Haven. To be able to order a hoagie, see the website. URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13161960003c85341c5a157c71b4c9a11fdc4ef033@sns.ias.edu DTSTART:20110916T180000Z DTEND:20110916T190000Z SUMMARY:Princeton University Astrophysical Sciences Special Talk - TIME & LOCATION CHANGE, "Gamma-ray Burst Afterglow Broadband Fitting Based Directly on Hydrodynamics Simulations" (Hendrik Van Eerten, New York University) DESCRIPTION: LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1316449800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110919T163000Z DTEND:20110919T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131653080081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110920T150000Z DTEND:20110920T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Galaxy Clusters and Cosmic Structure" (Leonidas Moustakas, Jet Propulsion Lab and California Institute of Technology) DESCRIPTION:ABSTRACT: Through their census, internal structure, and substructure, galaxy clusters encode signatures of the expansion history of the universe, and basic properties of the dark matter particle. I will present early work on systematic multi-wavelength studies of galaxy clusters recently discovered at redshifts beyond one, and recent quantitative cluster structure results from the Multi-Cycle program Cluster Lensing And Supernova Survey with Hubble (CLASH). I will discuss possible sources of systematic error, and if these are understood, how these results may lend unique insight now (or in the near future) on the nature of dark energy, and dark matter. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1316536200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110920T163000Z DTEND:20110920T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1316617200632957a5763464d5e53fdca9107890cd@sns.ias.edu DTSTART:20110921T150000Z DTEND:20110921T160000Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - SPECIAL DATE - TIME CHANGED, "Moving Mesh Cosmological Simulations" (Lars Hernquist, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. Discussing "Moving mesh cosmology: numerical techniques and global statistics," by Mark Vogelsberger (http://arxiv.org/abs/1109.1281). LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:13166226001ebe163122ea4d3630135d99d832159d@sns.ias.edu DTSTART:20110921T163000Z DTEND:20110921T173000Z SUMMARY:Princeton University Wunch Talk - Speaker 1, "Astrophysically Motivated Bulge Disk Decompositions in SDSS" (Claire Lackner, Princeton University) DESCRIPTION:ABSTRACT - The division of galaxies into disk and spheroid components is very old and reasonably successful. I will discuss a new set of two-dimensionalbulge-disk(B+D) decompositions for 70,000 nearby Sloan Digital Sky Survey (SDSS) galaxies, the largest such set to date. Each galaxy is fit with five different 2-dimensional models and the best fitting model is selected based on chi-squared values and astrophysical constraints (color, bulge-to-total ratio, shape, etc.). Fifty percent of the galaxies cannot be fit with a B+D model, but this represents only 20% of the stellar mass in our sample. Bulge color and shape can be used to separate elliptical-like classical bulgesfrom disk-like pseudo-bulges and this method agrees reasonably well with other methods used to distinguish classical bulges from pseudo-bulges. This large data set can be used to study the properties of differentmorphological types over a large range of galaxy properties and environments. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1316622600720eba9668205c860a107ed115504cee@sns.ias.edu DTSTART:20110921T163000Z DTEND:20110921T173000Z SUMMARY:Princeton University Wunch Talk - Speaker 2, "Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: NGC 628 and NGC 6946" (Gonzalo Aniano, Princeton University) DESCRIPTION:ABSTRACT - Physical models for interstellar dust are presented for NGC 628 and NGC 6946, two quite different galaxies observed by the IRAC and MIPS cameras on Spitzer Space Telescope, and the PACS and SPIRE cameras on Herschel Space Observatory. With wavelength coverage from 3.6um to 500um , the dust models are strongly constrained. For each pixel in each galaxy we estimate (1) the surface density of dust, (2) the fraction of the dust mass contributed byPAHs, (3) the distribution of intensities of starlight heating the dust grains, and (4) the IR luminosity originating in regions with high starlight intensity. We obtain total dust masses for each galaxy. The overall dust/H mass ratio is 0.010 002 for NGC 628, and 0.012 0.003 for NGC 6946, consistent with what is expected for near-solar metallicities. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1316703600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110922T150000Z DTEND:20110922T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Planetary Systems Around White Dwarfs" (You-Hua Chu, University of Illinois at Urbana-Champaign) DESCRIPTION:ABSTRACT: As a low- or intermediate-mass star evolve to the final white dwarf stage, it often loses more than 50% of its original mass. Consequently, its planetary system expands, and the collision rates among thesubplanetary bodies, such as asteroids and comets, would increase. While no planets have been convincingly detected around white dwarfs,dust disks produced by tidally disrupted asteroids or collisions among comets have been reported. We have conducted a Spitzer MIPS 24 micron survey of hot white dwarfs, and archival Spitzer IRAC/MIPS surveys of white dwarfs and central stars of planetary nebulae. IR excesses indicative of dust disks have been found in many cases. I will report these results and discuss their implications on planetary systems. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13167234008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20110922T203000Z DTEND:20110922T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Strong-Arming Electron Spin Dynamics" (Jason Petta, Princeton University) DESCRIPTION:ABSTRACT: Over ten years ago, Daniel Loss and David DiVincenzo proposed using the spin of a single electron as a quantum bit. At the time of the proposal, it was not possible to trap a single electron in a device and measure its spin, let alone demonstrate control of quantum coherence. In this talk I will describe recent progress in the field, focusing on two new methods for single spin control that have been developed by my group at Princeton. The first method is based on quantum interference and implements spin-interferometry on a chip. The second method utilizes the strong spin-orbit coupling of InAs. By shifting the orbital position of the electronic wavefunction at GHz frequencies, we can control the orientation of a single electron spin and measure the full g-tensor, which exhibits a large anisotropy due to spin-orbit interactions. Both methods for single spin control are orders of magnitude faster than conventional electron spin resonance and allow investigations of single spin coherence in the presence of fluctuating nuclear and spin-orbit fields. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:131679360022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20110923T160000Z DTEND:20110923T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "The Mathematical Approach to General Relativity" (Mihalis Dafermos, University of Cambridge) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:UPDATE: FOR THIS WEEK ONLY, LUNCH WILL BE PROVIDED URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13167990003f25da0693d644462d90cae59d877b95@sns.ias.edu DTSTART:20110923T173000Z DTEND:20110923T183000Z SUMMARY:Princeton University Astroplasmas Seminar - TIME CHANGED!, "Anisotropic Transport in the Intracluster Medium and the Cooling Flow Problem" (Matthew Kunz, Princeton University) DESCRIPTION:ABSTRACT: In weakly-collisional plasmas such as the intracluster medium (ICM), heat and momentum transport become anisotropic with respect to the local magnetic field direction. Anisotropic heat conduction causes the slow magnetosonic wave to become buoyantly unstable to the magnetothermal instability (MTI) when the temperature increases in the direction of gravity and to the heat-flux--driven buoyancy instability (HBI) when the temperature decreasesin the direction of gravity. The local changes in magnetic field strength that attend these instabilities cause pressure anisotropic that viscouslydamp motions parallel to the magnetic field. In this talk, I will discuss two important effects of pressure anisotropy on the dynamical and thermal stability of the ICM. First, by stifling the convergence/divergence ofmagnetic field lines, pressure anisotropy significantly affects how the ICM interacts with the temperature gradient. Instabilities which depend upon convergence/divergence of magnetic field lines to generate unstable buoyant motions (the HBI) are suppressed over much of the wavenumber space, whereas those which are otherwise impeded by field-line convergence/divergence (the MTI) are strengthened. Second, because the viscous heating of the ICM is regulated by the pressure anisotropy -- which itself is nonlinearly regulated by the plasma beta parameter via rapidly-growing micro scale instabilities -- pressure anisotropy may play a crucial role in mitigating cooling flow and preventing cluster core collapse. I will discuss the physical interpretation of these effects in detail, placing them within the larger context of formulating a pragmatic analytical and numerical framework for modeling astrophysical multi-scale plasma dynamics. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1316806200431c10f62fada0e288ea11514e315c3e@sns.ias.edu DTSTART:20110923T193000Z DTEND:20110923T203000Z SUMMARY:Princeton University Astrophysical Sciences PhD Thesis Colloquium - ADDED, "Disk Galaxy Masses: Connecting Dark and Luminous Matter with Kinematics and Weak Lensing" (Reinabelle Reyes, Princeton University) DESCRIPTION:A post-final public orals colloquium is scheduled for Friday, September 23 at 3:30 in Peyton Auditorium, followed by a reception at 4:30 in Grand Central Meeting Room. LOCATION:Princeton University, Peyton Hall, Auditorium COMMENT:A reception will follow at 4:30 in Grand Central Meeting Room URL: END:VEVENT BEGIN:VEVENT UID:1317052800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20110926T160000Z DTEND:20110926T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1317054600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20110926T163000Z DTEND:20110926T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "First Observational Tests of Eternal Inflation" (Stephen Feeney, University College London) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: In the picture of eternal inflation, our observable universe resides inside a single bubble nucleated from an inflating false vacuum. Many of the theories giving rise to eternal inflation predict that we have causal access to collisions with other bubble universes, providing an opportunity to confront these theories with observation. I will present the results from the first observational search for the effects of bubble collisions, usingcosmic microwave background data from the WMAP satellite. Our search targets a generic set of properties associated with a bubble collision spacetime,which will be described in detail. We use a modular algorithm that is designed to avoid a posteriori selection effects, automatically picking out the most promising signals, performing a search for causal boundaries, and conducting a full Bayesian parameter estimation and model selection analysis. I will outline each component of this algorithm, describing itsresponse to simulated CMB skies with and without bubble collisions. Our model selection results based on WMAP 7-year data do not warrant augmentingLCDM with bubble collisions. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:131705910013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20110926T174500Z DTEND:20110926T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "The Atlas3D Project - X" (Stephanie Tonnesen, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. This week let's read an ATLAS-3D paper, "The Atlas3D Project - X. On the Origin of the Molecular and Ionised Gas in Early-type Galaxies," Here is a link to the paper: http://adsabs.harvard.edu/abs/2011arXiv1107.0002D . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:131713560081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20110927T150000Z DTEND:20110927T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "New Probes of Strong Gravity Near Black Holes" (Avi Loeb, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:The lecture will present new techniques that will be employed over the coming decade to probe strong field gravity in the vicinity of black holes. Advances in technology (in the form of long baseline interferometry at a wavelength of ~1 millimeter) allow us already to image the silhouette of the black holes in the Galactic center (SgrA*) and M87. I will present the current preliminary data and its implications. Second, the gravitational radiation emitted by tight black hole binaries will be detectable with upcoming observatories, such as Advanced-LIGO and LISA.Third, the recoil induced by the anisotropic emission of gravitational waves in the final plunge of supermassive binaries could produce transient electromagnetic counterparts and also imprint detectable scars on theirhost galaxies. New surveys for transients (PTF, Pan-STARRS, LSST, WFIRST) will be sensitive to such counterparts, as well as to flares associated with the tidal disruption of stars which get close to the horizon ofmassive black holes. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1317141000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20110927T163000Z DTEND:20110927T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13172274001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20110928T163000Z DTEND:20110928T173000Z SUMMARY:Princeton University Wunch Talk, "Chemical Characterization of Exoplanetary Atmospheres" (Nikku Madhusudhan, Princeton University) DESCRIPTION:Recent advances in observations and theoretical modeling are leading to unprecedented constraints on molecular and elemental abundances inexoplanetary atmospheres. In this talk, I will present emerging constraints on chemical abundances in exoplanetary atmospheres, and their implicationsfor atmospheric processes (chemical and dynamical), planetary interiors and formation conditions. Strong constraints are emerging on molecular mixingratios of H2O, CO, CH4, and CO2, and on the C/H, O/H, and C/O ratios. In particular, the C/O ratio critically influences the H2O abundance, with major repercussions on atmospheric chemistry and thermal inversions, as well as on the composition of ices, rocks, and volatiles in planetary interiors and protoplanetary environments. Some of the first constraints span C/Oratios of unity or higher, opening the exotic possibility of carbon-rich planets (CRPs). The properties and formation scenarios of CRPs will be discussed in this talk, along with a new two-dimensional classificationscheme for exoplanetary atmospheres. An overview of new theoretical avenues and observational efforts from ground and space for chemical characterization of exoplanetary atmospheres will be presented. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1317308400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20110929T150000Z DTEND:20110929T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Tests of Gravity in the Local Universe" (Bhuvnesh Jain, University of Pennsylvania) DESCRIPTION:ABSTRACT: Gravity theories and large-scale cosmological tests have been actively pursued in recent years. This talk will focus on a new arena for astrophysical tests of gravity: dwarf galaxies and stars in the nearby universe. Theoretical predictions and observational constraints from existing data will be discussed. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1317327300f5b6c4f7267b559e2664dfa0e58ca951@sns.ias.edu DTSTART:20110929T201500Z DTEND:20110929T211500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia - NOTE DAY - ADDED, "Flow Shear and Tearing in Auroral Plasmas" (Chris C. Chaston, University of California - Berkeley) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 4:00 pm, seminar is at 4:15 pm. ABSTRACT: The fancing, kinking and curling lights of bright auroral displays are the consequence of plasma processes acting on current sheets extending outwards from the Earths upper atmosphere to the outer limits of the terrestrial magnetic field. In this presentation I will show how these dynamic light shows may be understood in terms of plasma instabilities common to many astrophysical and laboratory or fusion plasma environments perhaps analogous to those studied at PPPL. To set the scene I begin by showing some recent movies of the aurora as well as some cartoons and large-scale MHD simulations of the solar-terrestrialinteraction that ultimately powers the aurora. I then present plasma observations from spacecraft traversing those regions where the particle acceleration responsible for the visible emissionoccurs. These observations are used to create a model for the evolution of auroral current sheets which we simulate in an attempt to understand the rapid motions and structuring of the visible aurora. Tearing, flow shear and interchange instabilities are all found to play a role and ultimately launch an Alfvn wave cascade to smaller scales where dissipation through particleacceleration occurs. Time permitting, I will also discuss an upcoming NASA mission to fly within 10 solar radii from the surface of the Sun and study similar processes in the Solar corona that may ultimately accelerate thesolar wind. LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT: URL:http://www.pppl.gov/colloquia.cfm END:VEVENT BEGIN:VEVENT UID:1317328200e3eb51ee7c37a8e805aea46619b09f08@sns.ias.edu DTSTART:20110929T203000Z DTEND:20110929T213000Z SUMMARY:Princeton University Department of Physics Colloquium - ROOM CHANGE, "Observation of Scale Invariance and Quantum Criticality of Ultracold Atoms in Optical Lattices" (Cheng Chin, Princeton University) DESCRIPTION:ABSTRACT: The collective behavior of a many-body system near a continuous phase transition is insensitive to the details of its microscopic physics. Characteristic features near the phase transition, called critical phenomena, are that the thermodynamic observables follow generalized scaling laws. In this talk, I will discuss the observation of scale invariance and universality in ultracold atomic gases based on direct in situ imaging. Our observation points toward a growing density-density correlations in the critical regime and raises new perspectives to explore universal quantum critical dynamics. LOCATION:McDonnell Hall, Room A02 - NOTE ROOM COMMENT:Tea in 218 Jadwin Hall at 4 p.m. URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:131739840079699e82c060ae9cc18f478c73de41b3@sns.ias.edu DTSTART:20110930T160000Z DTEND:20110930T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 ADDED, "TBA" (Alexandra Rahlin, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:The Friday noon talks are catered by Hoagie Haven. To be able to order a hoagie, see the website. URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1317398400919a1469bd31e0bb575e6aad94450604@sns.ias.edu DTSTART:20110930T160000Z DTEND:20110930T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2 ADDED, "Journal Discussion" (Theodor Brasoveanu, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1317398400b688dcfab0e4ad3eef96174d6e4010bc@sns.ias.edu DTSTART:20110930T160000Z DTEND:20110930T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 ADDED, "Journal Discussion" (Lucas Parker, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1317400200f419de7d4071453d0b2de0634eca45ee@sns.ias.edu DTSTART:20110930T163000Z DTEND:20110930T173000Z SUMMARY:Princeton University Astroplasmas Seminar, "Dynamical and Nonthermal Processes in Galaxy Clusters" (Uri Keshet, Harvard-Smithsonian Center for Astrophysics and Ben Gurion University) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1317657600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111003T160000Z DTEND:20111003T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13176594009edabaf4527480057d6a4ff9e8bf12bb@sns.ias.edu DTSTART:20111003T163000Z DTEND:20111003T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - TITLE ADDED, "Detecting a Gravitational Wave Background with Cosmological Probes" (Laura Book, California Institute of Technology) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. ABSTRACT: It is predicted that a background of gravitational waves was produced in the early universe, and a detection of this background would give us unprecedented insight into the physics at work at early times. As well as direct detection experiments, which operate at high frequencies, it has been realized that gravitational waves of a wider range of frequencies can be detected indirectly through their effects on cosmological observables, such as the CMB or the positions of astrophysical objects. Both of these are currently being or will in the near future be measured to greater precision than ever before, making these methods of detecting the gravitational wave background very promising. In this talk I will discuss my own recent work on the use of astrometry and CMB lensing to detect or constrain the primordial gravitational wave background. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:131766390013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111003T174500Z DTEND:20111003T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Low Mass BHs and Their Hosts" (Yan-Fei Jiang, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The papers that will be discussed are: "Black Hole Mass and Bulge Luminosity for Low-mass Black Holes," by Yan-Fei Jiang, et al. (http://arxiv.org/abs/1107.4103) and "The Host Galaxies of Low-mass Black Holes," by Yan-Fei Jiang, et al. (http://arxiv.org/abs/1107.4105) . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:131774040081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111004T150000Z DTEND:20111004T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "LHC Results from 2011 and Their Implications for Physics Beyond the Standard Model" (Jay Wacker, Stanford Linear Accelerator Center (SLAC)) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1317745800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111004T163000Z DTEND:20111004T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13178322001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111005T163000Z DTEND:20111005T173000Z SUMMARY:Princeton University Wunch Talk, "Observable Signatures of Coalescing Compact Binaries" (Brian Metzger, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1317913200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111006T150000Z DTEND:20111006T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Massive Neutrinos and the Non-linear Matter Power Spectrum" (Simeon Bird, Institute for Advanced Study) DESCRIPTION:ABSTRACT: Measurements of the matter power spectrum provide an unparalleled opportunity for constraining the mass of the neutrino, due to the damping effect of the neutrino thermal velocity on the growth of cosmic structure. I will discuss recent results which use N-body simulations to fully explore this effect even in the fully non-linear regime. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1317933000371344c9fa6464bca9b26bf619bbaa17@sns.ias.edu DTSTART:20111006T203000Z DTEND:20111006T213000Z SUMMARY:Princeton University Department of Physics Colloquium - POSTPONED DESCRIPTION:This talk is postponed until October 18. LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13180032009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20111007T160000Z DTEND:20111007T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "A New Initial Data Solver Using the Conformal Thin Sandwich Method" (Fethi Ramazanoglu, Princeton University Physics grad student) DESCRIPTION:ABSTRACT: I will present our group's recently implemented code for an initial data (ID) solver for general relativity, IDSolve. A 3+1 decomposition breaks the Einstein Equations into two groups: hyperbolic "evolution equations" and elliptic "constraint equations". IDSolve aims to provide physically meaningful data that satisfies the constraint equations, which can be used as initial value in numerical evolution. IDSolve uses the Conformal Thin Sandwich (CTS) method and does not assume any symmetries or simplifications of the equations of CTS, unlike most of the currently used ID solvers. Specifically, it does not assume the freely specified conformal spatial metric to be flat. IDSolve uses a parallelized multi-grid (MG) elliptic solver with adaptive mesh refinement (AMR) to solve the CTS equations. Singularities are avoided using a regularization scheme. I will present our results of binary object initial data, for which the generality of our code enables us to set the CTS free data using a superposition of the exactly known single object space-times. An excellent review of the initial data problem of GR can be found at http://arxiv.org/abs/0704.0149 . LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://arxiv.org/abs/0704.0149 END:VEVENT BEGIN:VEVENT UID:131800320012a0f26a871ab5439d5cd1af29e473e8@sns.ias.edu DTSTART:20111007T160000Z DTEND:20111007T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2 - SPEAKER ADDED, "Journal Discussion" (Emily Grace, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1318003200746a16f677ff8753dd167121ffca1a5e@sns.ias.edu DTSTART:20111007T160000Z DTEND:20111007T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 - SPEAKER ADDED, "Journal Discussion" (BingKan Xue, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1318262400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111010T160000Z DTEND:20111010T170000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1318264200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111010T163000Z DTEND:20111010T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Probing the Very Early Universe with Large-scale Structure" (Fabian Schmidt, California Institute of Technology) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: Current and future galaxy surveys will map out a significant portion of the observable Universe. In addition to telling us about what the Universe is made of and how it evolved, the data can be used to probe the origin of the seed perturbations produced during inflation, in particular through primordial non-Gaussianity. I will explain the general idea and give some concrete examples. I will also discuss some of the theoretical issues that need to be solved in order to realize this potential. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131826870013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111010T174500Z DTEND:20111010T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Reddening from SDSS Stellar Spectra" (Eddie Schlafly, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The paper "Measuring Reddening with Sloan Digital Sky Survey Stellar Spectra and Recalibrating SFD," by Edward F. Schlafly and Douglas P. Finkbeiner will be discussed. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://iopscience.iop.org/0004-637X/737/2/103/pdf/apj_737_2_103.pdf END:VEVENT BEGIN:VEVENT UID:131834520081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111011T150000Z DTEND:20111011T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Coronal Radiation of a Cusp of Spun-up Stars and the X-ray Luminosity of Sgr A*" (Rashid Sunyaev, Max-Planck Institute for Astrophysics and Institute for Advanced Study) DESCRIPTION:Chandra has detected optically thin, thermal X-ray emission with a size of ~1 arcsec and luminosity ~10^33 erg/s from the direction of the Galactic supermassive black hole (SMBH), Sgr A*. We suggest that a significant or even dominant fraction of this signal may be produced by several thousand late-type main-sequence stars that possibly hide in the central ~0.1 pc region of the Galaxy. As a result of tidal spin-ups caused by close encounters with other stars and stellar remnants, these stars should be rapidly rotating and hence have hot coronae, emitting copious amounts of X-ray emission with temperatures kT<~ a few keV. The Chandra data thus place an interesting upper limit on the space density of (currently unobservable) low-mass main-sequence stars near Sgr A*. This bound is close to and consistent with current constraints on the central stellar cusp provided by infrared observations. If coronally active stars do provide a significant fraction of the X-ray luminosity of Sgr A*, it should be variable on hourly and daily time scales due to giant flares occurring on different stars. Another consequence is that the quiescent X-ray luminosity and accretion rate of the SMBH are yet lower than believed before. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1318350600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111011T163000Z DTEND:20111011T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13184370001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111012T163000Z DTEND:20111012T173000Z SUMMARY:Princeton University Wunch Talk, "The Origin of Cosmic Fireworks" (Tsvi Piran, The Hebrew University of Jerusalem) DESCRIPTION:Abstract: Gamma-Ray Bursts are the most remarkable explosions observed in our Universe. For a few seconds the burst's luminosity is comparable to the luminosity of the rest of the Universe combined. I describe the basic properties of Gamma-Ray Bursts focusing on their progenitors. Two well known groups of progenitors are Collapsars that produce long bursts when a jet penetrate the envelope of a collapsing massive star and neutron star mergers that produce short bursts. The established Collapsar model for long GRBs is based mostly on direct associations of some nearby long GRBs with type Ibc supernovae. I show however, that most of these bursts could not have formed by Collapsars and I suggest that there is a third group of low luminosity GRBs that are also associated also with a collapsing stars but must arise due to a different mechanism. At the same time, I use related arguments, to demonstrated conclusively that most regular GRBs arise from Collapsars! This provides the first direct proof for the Collapsar model. I also show that a significant fraction fo Swift's short burst arise from Collapsars. Finally I discuss radio flares that arise from neutron star mergers in addition to gamma-ray bursts and their implications for the detection of gravitational waves from these sources. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1318518000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111013T150000Z DTEND:20111013T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Constraints on Inflationary Features from the CMB" (Cora Dvorkin, Institute for Advanced Study) DESCRIPTION:Abstract: I introduce a general method for constraining the shape of the inflationary potential from Cosmic Microwave Background (CMB) temperature andpolarization power spectra. This approach relates the CMB observables to the shape of the inflationary potential via a single source function that isresponsible for the observable features in the initial curvature power spectrum. The source function is, to an excellent approximation, simply related to the slope and curvature of the inflaton potential, even in thepresence of large or rapidly changing deviations from scale-free initial conditions. Oscillatory features in the CMB temperature power spectrum have led tointerest in exploring models with features in the inflationary potential, but such cases are typically studied on a case-by-case basis. This formalismgeneralizes previous studies by exploring the complete parameter space of inflationary models in a single analysis. I will present results from a Markov Chain Monte Carlo likelihood analysis of WMAP 7-year and other data sets that probe the inflationary potential both at large and small scales, and I will discuss constraints from upcoming high-sensitivity experiments. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13185378008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111013T203000Z DTEND:20111013T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Single Molecule Biophysics: Gene Regulation, Studied on Molecule at a Time" (Steven Block, Stanford University) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events/colloquia/ END:VEVENT BEGIN:VEVENT UID:131860800022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20111014T160000Z DTEND:20111014T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "What You Don't Know About Black Hole Orbits" (Gabriel Perez-Giz, New York University) DESCRIPTION:ABSTRACT: The geodesic equations around a Kerr black hole have been known for almost four decades and can be easily integrated numerically. Nevertheless, when it comes to a qualitative understanding of Kerr geodesics, many authors label the resulting motion simply as "messy". Despite the strong recent impetus in the gravitational wave community to improve that understanding, the full range of orbital phenomena that eccentric and non-equatorial Kerr geodesics can exhibit remains relatively unexplored. In this talk, I will introduce some tools that allow us to organize and analyze generic Kerr geodesics as easily and as elegantly as we can their Schwarzschild cousins. With these tools, we will uncover some of the rich phenomena harbored by this dynamical system, including some surprising and heretofore unreported orbital features. Finally, I will show how what we learn in the process yields huge dividends for the calculation of the inspiral of stellar mass objects into spinning supermassive black holes due to radiation reaction from gravitational wave emission. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:The Friday noon talks are catered by Hoagie Haven. To be able to order a hoagie, see the website. URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1318615200fdaf6d67821329e676b02a00cb685198@sns.ias.edu DTSTART:20111014T180000Z DTEND:20111014T210000Z SUMMARY:Princeton University Astrophysical Sciences Orientation - ADDED, "Princeton University Astrophysical Sciences Department Orientation" (Various - see wiki link) DESCRIPTION:We are once again planning for our annual department orientation, during which everyone gets 2 minutes to introduce themselves and give a brief overview of their work. This is a wonderful opportunity to meet our newcomers, get reacquainted with everyone and find out what projects and interests everyone has. As you may remember, everyone is allowed just ONE overhead transparency (no laptop projections) and just TWO minutes to speak. The orientation this year will be Friday, October 14, 2:00-5:00 p.m., in the auditorium in Peyton Hall. A reception will follow at 5 pm. A party will follow at 7 pm at David Spergel's house (14 Journeys End) . Please use the wiki link to sign up for your two minute talk. The organizer is Keren Fedida, Communications & Logistics Coordinator, Web Administrator, Astrophysics Sciences, Princeton University. Email: kerenf@astro.princeton.edu . LOCATION:Peyton Hall Auditorium COMMENT: URL:http://departmentorientation2011.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:1318869000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111017T163000Z DTEND:20111017T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Non-Gaussianity in Single Field Inflation Beyond Slow-roll" (Johannes Noller, Imperial College) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. ABSTRACT: In inflationary theories, single field models are typically considered subject to slow-roll conditions. In this talk I will present current observational constraints on deviations from slow-roll, e.g. bounds coming from strong coupling considerations, scale-dependent non-Gaussianities and the tensor-to-scalar ratio. These constraints still allow significant violations of slow-roll conditions. Focusing on non-Gaussian signals, I will discuss a variety of intriguing observable signatures that can be found for fast-rolling single fields. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:13188690001115c1a3489274c84520d4c9160adf15@sns.ias.edu DTSTART:20111017T163000Z DTEND:20111017T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group - NOTE NEW TIME, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131887350013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111017T174500Z DTEND:20111017T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Satellites of L* Galaxies" (Eric Tollerud, Discussion Leader, University of California - Irvine) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. Paper to be discussed is "Small-scale Structure in the Sloan Digital Sky Survey and LCDM: Isolated ~L * Galaxies with Bright Satellites," by Tolerud, E., et al. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://adsabs.harvard.edu/abs/2011ApJ...738..102T END:VEVENT BEGIN:VEVENT UID:131895000081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111018T150000Z DTEND:20111018T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Future of Large Scale Structure: Weak Lensing or Galaxy Clustering?" (Uros Seljak, University of California, Berkeley) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1318955400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111018T163000Z DTEND:20111018T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13189698000abf098e72af8d003f45d6212b702f3f@sns.ias.edu DTSTART:20111018T203000Z DTEND:20111018T213000Z SUMMARY:Princeton University Department of Physics Colloquium (Rescheduled from October 6), "The Quest for New Frontier at the LHC" (Valerie Halyo, Princeton University) DESCRIPTION:Abstract: The 7 TeV center of mass energy proton- proton machine built in the LEP tunnel is housing 4 major experiments ATLAS, ALICE, CMS and LHCb in its 100 meter underground cavern. These experiments will be recording the particles left by the debris from the collisions and looking for new physics interactions and phenomena. Following the formal approval for the Large Hadron Collider (LHC) machine in 1996 it was put in operation at 2009. Since then it performed extremely well increasing the instantaneous luminosity over 6 orders of magnitude and reaching the design startup luminosity of 1E33 cm-2 s-1. In 2011 LHC delivered the high luminosity experiments CMS/ATLAS with about 5fb-1 of integrated luminosity and LHCb with about 1fb-1 of integrated luminosity allowing a large number of physics results to be produced by all LHC experiments. A survey covering the latest highlights from the 4 major LHC experiments will be presented. LOCATION:Jadwin Hall, Room A10 COMMENT:Tea in 218 Jadwin Hall at 4 p.m. URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:13190418001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111019T163000Z DTEND:20111019T173000Z SUMMARY:Princeton University Wunch Talk, "X-ray Insights into the Nature of Weak-Line Quasars" (Jianfeng Wu, The Pennsylvania State University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1319122800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111020T150000Z DTEND:20111020T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Formation of Molecular Clouds and Massive Stars" (Mordecai-Mark Mac Low, American Museum of Natural History) DESCRIPTION:ABSTRACT: In this talk I consider two questions. First, I investigate the formation of molecular clouds from diffuse interstellar gas. It has been argued that the midplane pressure controls the fraction of molecular hydrogen present, and thus the star formation rate. Alternatively, I and others have suggested that the gravitational instability of the disk controls both. I present numerical results demonstrating that the observed correlations between midplane pressure, molecular hydrogen fraction, and star formation rate can be explained within the gravitational instability picture. Second, I discuss how ionization affects the formation of massive stars. Although most distinctive observables of massive stars can be traced back to their ionizing radiation, it does not appear to have a strong effect on their actual formation. Rather, I present simulations suggesting that stars only ionize large volumes after their accretion has already been throttled by gravitational fragmentation in the accretion flow. At the same time these models can explain many aspects of the observations of ultracompact H II regions. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13191426008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111020T203000Z DTEND:20111020T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Entanglement and Quantum Algorithms with Superconducting Circuits" (Robert Schoelkopf, Princeton University) DESCRIPTION:ABSTRACT: By using the unique properties of quantum physics, such as entanglement and superposition, quantum computers are predicted to be vastly more powerful than their classical counterparts for certain tasks. While some technologies, such as NMR and trapped ions, have succeeded in making and manipulating a handful of quantum bits (qubits), they look quite different from a conventional computer, and there are many obstacles to building large-scale processors. At Yale, we use superconducting circuits to make macroscopic, solid-state qubits which are controlled and measured entirely by a sequence of electronic pulses on wires. These devices have advanced to the point where we can generate and detect highly-entangled states, and perform universal quantum gates. I will describe recent experiments showing the operation of Grovers search algorithm, and measurements of the violation of a Mermin inequality for a three-qubit entangled GHZ state. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:131921280079699e82c060ae9cc18f478c73de41b3@sns.ias.edu DTSTART:20111021T160000Z DTEND:20111021T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 ADDED, "Perturbation Theory in Inflation" (Guilherme Pimentel, Princeton University Physics grad student) DESCRIPTION:ABSTRACT: I will talk about aspects of perturbation theory in inflation, focusing on gravitational waves, from the point of view of the wavefunction of the universe and perturbation theory in the bulk. I will also comment a few things on IR effects in single field inflation. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13192128006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20111021T160000Z DTEND:20111021T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (John Appel, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1319212800d85a18954fca40239501cf1e2e9810d5@sns.ias.edu DTSTART:20111021T160000Z DTEND:20111021T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3, "Journal Discussion" (William East, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1319218200f419de7d4071453d0b2de0634eca45ee@sns.ias.edu DTSTART:20111021T173000Z DTEND:20111021T183000Z SUMMARY:Princeton University Astroplasmas Seminar, "Electromagnetic Extraction of Energy from Black Hole-neutron Star Binaries" (Sean McWilliams, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13192272002054e30db8b47cf3994ccb465437c3f7@sns.ias.edu DTSTART:20111021T200000Z DTEND:20111021T210000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - TITLE ADDED - NOTE SPECIAL DAY & TIME, "New Constraints on Cosmological Reionization from the South Pole Telescope" (Oliver Zahn, The Berkeley Center for Cosmological Physics) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1319473800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111024T163000Z DTEND:20111024T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Ultra-light Axions: Degeneracies with Massive Neutrinos and Forecasts for Future Cosmological Observations" (David J. E. Marsh, Oxford University) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: A generic prediction of string theory is the existence of many axion fields. It has recently been argued that many of these fields should be light and, like the well known QCD axion, lead to observable cosmological consequences. In this paper we study in detail the effect of the so-called string axiverse on large scale structure, focusing on the morphology and evolution of density perturbations, anisotropies in the cosmic microwave background and weak gravitational lensing of distant galaxies. We quantify specific effects that will arise from the presence of the axionic fields and highlight possible degeneracies that may arise in the presence of massive neutrinos. We take particular care understanding the different physical effects and scales that come into play. We then forecast how the string axiverse may be constrained and show that with a combination of different observations, it should be possible to detect a fraction of ultralight axions to dark matter of a few percent. I focus on the lightest axions, with mass <10^{-28}eV, and present a exact numerical study on their cosmological effects. I will briefly introduce axions in string theory and their motivation as an ultra-light dark matter ingredient based in part on the observance of excess relativistic energy density and neutrino masses. I will then review their known effects on large scale structure, before presenting new work on precision observables and forecasts for a Euclid-style mission. I may also review some other work on an extension of this model to include coupling to other moduli fields. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1319473800e3bf690845ec27a6142836a71ce72c1b@sns.ias.edu DTSTART:20111024T163000Z DTEND:20111024T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group - NOTE CHANGED START TIME, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:131947830013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111024T174500Z DTEND:20111024T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Merger Rates" (Elisa Chisari, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. To be discussed are: "The diminishing importance of major galaxy mergers at higher redshifts," by Rik J. Williams, et al. and "The Major and Minor Galaxy Merger Rates at z < 1.5," by Lotz, et. al. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1108.2508 END:VEVENT BEGIN:VEVENT UID:131955480081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111025T150000Z DTEND:20111025T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Piecing Together the Puzzle of Galaxy and Black Hole Co-evolution" (Rachel Somerville, Rutgers, The State University of New Jersey) DESCRIPTION:ABSTRACT: Nearly all astronomers now believe that most or all galaxies contain a supermassive black hole, and that many properties of the galaxy are tightly correlated with the mass of the black hole. It is becoming widely accepted that the energy released by these growing black holes probably has a significant impact on the host galaxy and its surroundings, and it has been suggested that this process of "AGN feedback" could solve some outstanding problems in cosmological simulations of galaxy formation. However, many important questions remain unanswered: how do the "seed" black holes form and what are their masses? How is black hole growth triggered and regulated, and what is the physical origin of the correlation between black hole mass and galaxy properties? What is the relationship between star formation and black hole accretion? How, in detail, does the energy released by accreting black holes couple with the gas that surrounds and feeds galaxies? I will address these questions with an overview of recent observational results from deep multi-wavelength surveys, and with predictions from theoretical models and simulations. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1319560200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111025T163000Z DTEND:20111025T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13196466001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111026T163000Z DTEND:20111026T173000Z SUMMARY:Princeton University Wunch Talk, "New Insights into Galaxy Image Decomposition from Bayesians" (Ilsang Yoon, University of Massachusetts) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1319655600e95262666189123b24f94add4ce27866@sns.ias.edu DTSTART:20111026T190000Z DTEND:20111026T203000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar- SPECIAL DAY & TIME, "Self-consistent Velocities in Collisional Cascades and How We Might Observe Them" (Margaret Pan, University of California, Berkeley) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1319727600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111027T150000Z DTEND:20111027T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Phase-space Structure of Mono-abundance Sub-populations of the Milky Way Disk" (Jo Bovy, Institute for Advanced Study) DESCRIPTION:Observations of the structure and kinematics of different stellar populations in the Milky Way's disk provide a unique perspective on disk formation and evolution. I will discuss how current and future data sets that provide detailed kinematics and elemental abundances beyond the Solar neighborhood lead to qualitatively new tests of internal and external disk evolution models. In particular, I will show recent results from a dissection into mono-abundance components of the Galactic disk based on SDSS/SEGUE data. These results show that the individual components are simple, but exhibit very different spatial structure, and they lend direct observational support for inside-out formation models for galactic disks. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13197474008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111027T203000Z DTEND:20111027T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "On the Verge of Mechanical Instability" (Tom Lubensky, University of Pennsylvania) DESCRIPTION:ABSTRACT: The mechanical stability of bridges, buildings, and other architectural wonders is of critical importance to us all. In 1864, James Clerk Maxwell formulated a theory for the stability of frames composed of straight struts, capable of supporting tension and compression, connected at points of contact. Of particular interest are isostatic systems that have just enough struts to ensure mechanical stability. Maxwell's ideas have found applications in many fields from civil engineering to biophysics. This talk will present an overview of condensed-matter systems from network glasses to jammed solids to networks of semi-flexible polymers for which Maxwell's ideas have provided fruitful insight. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:131981760079699e82c060ae9cc18f478c73de41b3@sns.ias.edu DTSTART:20111028T160000Z DTEND:20111028T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 ADDED, "Hydrodynamics and Gravity in AdS" (Hans Bantilan, Princeton University Physics grad student) DESCRIPTION:Abstract: Essentially all known physical systems at sufficiently high temperature exhibit hydrodynamic behavior once local thermodynamic equilibrium has been attained. The gauge/gravity duality provides a connection between equilibrium thermal states of a conformal field theory (CFT) and asymptotically anti-de Sitter (AdS) black holes; studies have shown that a perturbation of this kind of bulk spacetime manifests itself as hydrodynamic behavior in the dual boundary CFT. Given our ability to numerically evolve asymptotically AdS spacetimes, including those that contain highly distorted black holes, the question naturally arises: at what point in the evolution does hydrodynamics become a good description of the boundary? LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1319817600b688dcfab0e4ad3eef96174d6e4010bc@sns.ias.edu DTSTART:20111028T160000Z DTEND:20111028T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 ADDED, "Journal Discussion" (Guilherme Pimentel, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1319817600919a1469bd31e0bb575e6aad94450604@sns.ias.edu DTSTART:20111028T160000Z DTEND:20111028T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2 ADDED, "Journal Discussion" (Katerina Visnjic, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1320078600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111031T163000Z DTEND:20111031T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13200786009b34269324ecec2ee4cfeae9cee35c5a@sns.ias.edu DTSTART:20111031T163000Z DTEND:20111031T173000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Lunch Discussion (General Discussion) DESCRIPTION:The Monday Transient Lunch will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The first meeting will be organizational. Please e-mail Jose Prieto to be added to the e-mail list. LOCATION:Institute for Advanced Study, Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1320078600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111031T163000Z DTEND:20111031T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Mass Hierarchies, Decoupling and the Imprints of Heavy Fields During Inflation" (Subodh Patil, Ecole Normale/Polytechnique Paris) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. ABSTRACT: The effective theory (EFT) of inflation is a powerful framework to consistently parametrize inflationary models at the relevant energy scales. In an effectively single field setting, all heavy modes that couple to the inflaton integrate out to a derivative expansion which order by order is parametrically suppressed by powers of H^2/M^2-- M being the cutoff of the theory and H being the scale of Inflation. This is what we mean by heavy fields having decoupled. In this talk we discuss how certain higher dimensional operators can become transiently strongly coupled during inflation if the inflaton trajectory traverses a sharp enough bend in field space. This strong coupling can compete with the H^2/M^2 suppression enough to result in corrections to CMB observables that cross the threshold of detectability, even as slow roll and an effective single field description remain valid. We argue that these corrections ought to be generic, and are due to the appearance of a new strong coupling scale during inflation. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:132008310013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111031T174500Z DTEND:20111031T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Tully-Fisher Relation" (Sarah Miller, Oxford University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. This paper will be discussed, "The Assembly History of Disk Galaxies. I. The Tully-Fisher Relation to z~1.3 from Deep Exposures with DEIMOS," by Miller, et al. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://iopscience.iop.org/0004-637X/741/2/115/ END:VEVENT BEGIN:VEVENT UID:132015960081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111101T150000Z DTEND:20111101T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "New Developments in Spiral Structure Theory" (Jerry Sellwood, Rutgers, The State University of New Jersey) DESCRIPTION:Abstract: Over 150 years after their discovery, astronomers still lack a complete theory for the origin of the beautiful spiral patterns in disk galaxies. I will review the various ideas that have been proposed and describe some recent observational data that appear to support a recurrent instability mechanism. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1320165000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111101T163000Z DTEND:20111101T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13202514001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111102T163000Z DTEND:20111102T173000Z SUMMARY:Princeton University Wunch Talk, "A New Near-IR Survey of the Southern Milky Way" (Dante Minniti, Pontifica Universidad Catolica) DESCRIPTION:ABSTRACT: The VISTA Variables of the Via Lactea Survey (VVV) is a large ESO Public near-IR survey of the inner Milky Way bulge and Southern plane. In the first part of the talk I will describe the design, observations, data processing, and current status of the VVV Survey. In the second part I will try to summarize the new results and discoveries made, that cover a wide variety of projects on the Solar System, Galactic structure, stellar populations, star clusters, variable stars, high energy sources, and background galaxies. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1320332400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111103T150000Z DTEND:20111103T163000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Constructing a Hubble Diagram with Baryon Oscillations" (Nikhil Padmanabhan, Yale University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132042240022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20111104T160000Z DTEND:20111104T170000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "Connecting Cosmology and Galaxy Evolution with the Clustering of High-Redshift Dusty Star-Forming Galaxies" (Graeme Addison, University of Oxford) DESCRIPTION:ABSTRACT: The clustering of high-redshift dusty star-forming galaxies (DSFGs) is currently of interest both as a foreground for Cosmic Microwave Background analysis and for studying galaxy evolution. I will present recent work in which I combine Planck, ACT and BLAST data to construct a simple template for the clustered source contribution to the angular power spectrum, useful for extracting small-scale CMB anisotropy measurements from foreground-dominated maps.I will then discuss the challenges associated with extracting physical properties (e.g., host halo mass, redshift distribution, dust temperature) of unresolved DSFGs from the angular power spectrum, and how combining different statistics from Planck, Herschel and future data sets can overcome these issues. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1320687000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111107T173000Z DTEND:20111107T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Categorizing Models of Cosmic Acceleration" (Jolyon Bloomfield, Cornell University) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1320687000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111107T173000Z DTEND:20111107T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13206870004a686bbfedbf470b01ec949f0a4f9907@sns.ias.edu DTSTART:20111107T173000Z DTEND:20111107T183000Z SUMMARY:Princeton University Princeton Institute for Computational Science and Engineering Colloquium, "yt: Astrophysical-Aware Analysis and Visualization" (Matthew Turk, Columbia University) DESCRIPTION:ABSTRACT: The analysis of complex multiphysics astrophysical simulations presents a unique and rapidly growing set of challenges: reproducibility, parallelization, and vast increases in data size and complexity chief among them. In order to meet these challenges, and in order to open up new avenues for collaboration between users of multiple simula- tion platforms, I will present on yt (available at http://yt-project.org/) an open source, community-developed astro- physical analysis and visualization toolkit, designed to work with Enzo, Orion, RAMSES, FLASH, and Nyx. Analysis and visualization with yt are oriented around physically relevant quantities rather than quantities native to astrophysi- cal simulation codes. I will demonstrate yt's functionality, describe its methods and algorithms for parallel analysis, discuss yt's extensibility to work with new simulation codes, and close with a brief gallery of visualization and analy- sis results. Matthew Turk is an NSF OCI Postdoctoral fellow at Columbia University, working on simulations of the first stars and galaxies in the universe. He received his PhD from Stanford University and worked at UCSD as a postdoc, and is interested in the high-redshift universe, high performance computing, agile and immersive data analysis, and the development of infrastructure for next-generation simulations and visualization. LOCATION:Visualization Lab, 346 Lewis Science Library COMMENT:Lunch served at 11:45 am in PICSciE reception area, 300 Lewis Science Library. URL:http://www.princeton.edu/researchcomputing END:VEVENT BEGIN:VEVENT UID:132069150013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111107T184500Z DTEND:20111107T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "LINER-like Emission in Red Galaxies" (Renbin Yan, Discussion Leader, New York University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The paper to be discussed is "The Nature of LINER-like Emission in Red Galaxies," by Yan and Blanton, http://arxiv.org/abs/1109.1280 . The group's website is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1109.1280 END:VEVENT BEGIN:VEVENT UID:13206924008ec771449933acb3e2322f92d407f3c3@sns.ias.edu DTSTART:20111107T190000Z DTEND:20111107T210000Z SUMMARY:Princeton University Princeton Institute for Computational Science and Engineering Hand On Session, "yt: Astrophysical-Aware Analysis and Visualization" (Matthew Turk, Columbia University) DESCRIPTION:After the talk, 2-4pm, there will be a hands-on session with Matt on how to use yt in practice. If you are interested in using this tool, please consider attending the hands-on session, and bring your laptop. ABSTRACT (for the technical session): During the 2:004:00 PM deep-dive into yt, well cover installing yt on a cluster, getting started analyzing datasets from a code that yt understands, and then move on to simple analysis and plotting, leading up to very simple volume rendering and quantitative plots. Finally, well discuss very briefly how to load data from other codes into yt, and the restrictions on what types of data yt is currently able to handle. LOCATION:Visualization Lab, 346 Lewis Science Library COMMENT: URL:http://www.princeton.edu/researchcomputing END:VEVENT BEGIN:VEVENT UID:132076800081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111108T160000Z DTEND:20111108T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Decoding Gravitational Wave Signals from Double Compact Objects" (Will Farr, Northwestern University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1320773400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111108T173000Z DTEND:20111108T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13208598001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111109T173000Z DTEND:20111109T183000Z SUMMARY:Princeton University Wunch Talk, "The Berkeley SuperNova Ia Program (BSNIP): Dataset and Initial Analysis" (Jeff Silverman, University of California, Berkeley) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1320940800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111110T160000Z DTEND:20111110T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "A Physical Mechanism for Deflagration-to-Detonation Transitions (DDTs)" (Doron Kushnir, Weizmann Institute) DESCRIPTION:ABSTRACT: DDTs are observed in terrestrial combustion flows, and are inferred to occur in supernova explosions of type Ia. The physical mechanism responsible for DDT, in both chemical and nuclear combustion, is a long standing open question. We propose (arXiv:1108.4690) a novel mechanism for the transition, showing that detonation may be ignited by converging shocks in nearly sonic turbulent deflagration flows. The suggested mechanism is an alternative to the one proposed by Zeldovich et al. (1970), in which finely tuned spatial gradients in the combustible medium must be maintained in the turbulent deflagration flow. The model makes predictions that may be tested by both terrestrial experiments and numerical simulations. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13209444006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20111110T170000Z DTEND:20111110T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "TBA" (Antonino Marciano, Haverford College/Princeton University) DESCRIPTION:The group's website is: http://www.physics.princeton.edu/cosmology/journalclub/ . LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13209606008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111110T213000Z DTEND:20111110T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Strings and the Magic of Extra Dimensions" (Cumrun Vafa, Harvard University) DESCRIPTION:ABSTRACT: The extra dimensions of string theory which were originally viewed as a source of embarrassment for the theory, have proven to be instrumental in resolving a number of puzzles associated with 3+1 dimensional physics. I discuss examples of this in the context of black holes, gauge theory and particle phenomenology. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events/colloquia/ END:VEVENT BEGIN:VEVENT UID:132103080022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20111111T170000Z DTEND:20111111T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "Do Baryons Trace Dark Matter in the Early Universe? Compensated Isocurvature Perturbations and the Cosmic Microwave Background" (Daniel Grin, Institute for Advanced Study) DESCRIPTION:ABSTRACT: Measurements of cosmic microwave background (CMB) anisotropies constrain isocurvature fluctuations between photons and non-relativistic particles to be sub-dominant to adiabatic fluctuations. Perturbations in the relative number densities of baryons and dark matter, however, are surprisingly poorly constrained. In fact, baryon-density perturbations of fairly large amplitude may exist if they are compensated by dark-matter perturbations, so that the total density remains unchanged. These compensated isocurvature perturbations (CIPs) leave no imprint on the CMB at observable scales, at linear order in their amplitude. I will review the standard lore on isocurvature, and motivate the consideration of CIPs. I will then consider a variety of astrophysical probes of CIPs. I will then show that the conventional wisdom on CIPs fails: CIPs do leave an imprint on the cosmic microwave background, providing a new mode for B-mode generation. I will show how the cosmic microwave background could be used to probe for fluctuations between baryon and dark matter. I will conclude by considering both some practical issues involved in CIP extraction from the data, and horizons for future theoretical work on CIPs. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13212918000f2a967835ae6fb184e688ec9406edc5@sns.ias.edu DTSTART:20111114T173000Z DTEND:20111114T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion - TITLE UPDATED, "Measurements of Non-Gaussianity And the CIB Fluctuations High Redshift Sources" (Joseph Smidt, University of California, Irvine) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: Measurements of Cosmic Microwave Background (CMB) anisotropies haveserved as the strongest experimental probe of the early Universe to date. If the CMB were a purely Gaussian field, all statistical information would be contained in the power spectrum or two-point correlation function. However, non-Gaussianities ensure that new physics may be extracted from higher n-point correlation functions including the bispectrum and trispectrum of the CMB. In this talk I will discuss new estimators we have formulated to probe primordial non-Gaussianity in the bispectrum and trispectrum of CMB data and the constraints we have made using WMAP data while discussing implications for inflationary models. I will also discuss how these same methods may be used to probe other types of physics in higher order correlation functions such as the amplitude of lensing of the CMB for which we have also made a constraint using the trispectrum of WMAP data. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1321291800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111114T173000Z DTEND:20111114T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1321295400370e370a4515ecd6cefb7831febcdf82@sns.ias.edu DTSTART:20111114T183000Z DTEND:20111114T193000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Discussion (General Discussion) DESCRIPTION:A bi-weekly discussion will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The location will alternate between Princeton University and the Institute for Advance Study. Check the group website for the Princeton University meeting location. Please e-mail Jose Prieto to be added to the e-mail list. See the web site for papers to be discussed. LOCATION:Princeton University, Peyton Hall COMMENT: URL:http://princetontransients.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:132129630013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111114T184500Z DTEND:20111114T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Local Remnants of the Most Massive Quasars?" (Nicholas McConnell, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group website is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://iopscience.iop.org/1538-4357/583/1/L5 END:VEVENT BEGIN:VEVENT UID:13213008008fdf066d3bc787ebcd1e3da0613bd323@sns.ias.edu DTSTART:20111114T200000Z DTEND:20111114T210000Z SUMMARY:Princeton University Astrophysical Sciences Special Seminar, "Automated Source Classification for the Synoptic Survey Era" (Joseph Richards, University of California, Berkeley) DESCRIPTION:ABSTRACT: With the fast-approaching deluge of photometric data from synoptic surveys such as Gaia and LSST, there is an urgent need for methods that quickly and automatically classify newly-observed sources from a small number of light-curve measurements. Scientific discovery on such massive data streams is in no way guaranteed: these projects require sophisticated statistical tools for source detection, object classification, outlier detection, and optimal allocation of follow-up resources. In this talk, I will detail our current use of state-of-the-art machine learning methods to perform real-time discovery and event classification for the Palomar Transient Factory (PTF), where the challenge is to find the handful of real astrophysical transients out of 1.5 million nightly candidates. I will also describe how we construct catalogs of probabilistic source classifications using long-baseline retrospective light curves from surveys such as the All Sky Automated Survey (ASAS) and PTF. Finally, I will describe our efforts to overcome sample selection bias, where the distribution of labeled, well-understood objects is an inherently biased sample from the population of interest. In particular, I will show that active learning is a powerful tool to overcome sample selection bias, and will detail its use on a variety of astronomical data sets. LOCATION:Princeton University, Peyton Hall, Room 33 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132137280081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111115T160000Z DTEND:20111115T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Universality in Multifield Inflation" (Liam McAllister, Cornell University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1321378200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111115T173000Z DTEND:20111115T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13214646001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111116T173000Z DTEND:20111116T183000Z SUMMARY:Princeton University Wunch Talk, "Signatures of Supermassive Black Hole Mergers: Before and After" (Laura Blecha, Harvard University) DESCRIPTION:ABSTRACT: Supermassive black hole (SMBH) pairs are expected to form in major galaxy mergers. However, until recently, only a few such objects were known, and even less is known empirically about their subsequent evolution to a BH merger and gravitational-wave recoil kick. I will review the remarkable recent progress in identifying candidate SMBH pairs, as well as recent identifications of candidate recoiling SMBHs. I will then describe our efforts to interpret these findings and make predictions for future observations using hydrodynamic simulations of galaxy mergers that include SMBHs. Because many candidate SMBH pairs have been identified as double-peaked narrow-line (NL) AGN, which may be associated with BH motion on kiloparsec scales, we have made a first attempt to model the NL region in galaxy merger simulations. In general, we find that double-peaked NL AGN are a short-lived but generic phase in gaseous major mergers, and that they arise from a varied combination of BH motion and gas kinematics. I will discuss the implications of our findings for follow-up confirmation of SMBH pair candidates. Additionally, I will summarize the results of our large study of recoiling SMBHs in galaxy merger simulations. I will describe the dynamics of recoil in gas-rich versus gas-poor mergers, as well as the possible effects of recoil on star formation and the BH-bulge relations. Recoiling SMBHs may be observed as kinematically- or spatially-offset AGN with lifetimes of up to tens of Myr; I will conclude by describing efforts to model a candidate recoiling SMBH that displays both types of offset. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1321545600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20111117T160000Z DTEND:20111117T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Simulating Granular Dynamics in Low Gravity" (Derek Richardson, University of Maryland) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13216356006fc71c27916c5c55bb7281c64e3bcf93@sns.ias.edu DTSTART:20111118T170000Z DTEND:20111118T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1 UPDATED, "Observing the Multiverse with Cosmic Wakes" (John Appel, Princeton University Physics grad student) DESCRIPTION:The speaker will be presenting an articles by Matthew Kleban, NYU, http://arxiv.org/find/astro-ph/1/au:+Kleban_M/0/1/0/all/0/1 ; Thomas S. Levi, UBC, http://arxiv.org/find/astro-ph/1/au:+Levi_T/0/1/0/all/0/1 ; and Kris Sigurdson, UBC, http://arxiv.org/find/astro-ph/1/au:+Sigurdson_K/0/1/0/all/0/1 ; and http://arxiv.org/abs/1109.3473v1, [astro-ph.CO]. ABSTRACT: Current theories of the origin of the Universe, including string theory, predict the existence of a multiverse containing many bubble universes. These bubble universes will generically collide, and collisions with ours produce cosmic wakes that enter our Hubble volume, appear as unusually symmetric disks in the cosmic microwave background (CMB) and disturb large scale structure (LSS). There is preliminary observational evidence consistent with one or more of these disturbances on our sky. However, other sources can produce similar features in the CMB temperature map and so additional signals are needed to verify their extra-universal origin. Here we find, for the first time, the detailed three-dimensional shape and CMB temperature and polarization signals of the cosmic wake of a bubble collision in the early universe consistent with current observations. The predicted polarization pattern has distinctive features that when correlated with the corresponding temperature pattern are a unique and striking signal of a bubble collision. These features represent the first verifiable prediction of the multiverse paradigm and might be detected by current experiments such as Planck and future CMB polarization missions. A detection of a bubble collision would confirm the existence of the Multiverse, provide compelling evidence for the string theory landscape, and sharpen our picture of the Universe and its origins." LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13216356009f76314a706e35682e2194a6c7ead98c@sns.ias.edu DTSTART:20111118T170000Z DTEND:20111118T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2 UPDATED, "Journal Discussion" (Fethi M Ramazanoglu, Princeton University Physics grad student) DESCRIPTION:Journal discussion on "Nothing" by A. Brown & A. Dahlen http://arxiv.org/abs/1111.0301 . LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://arxiv.org/abs/1111.0301 END:VEVENT BEGIN:VEVENT UID:1321635600d12d9cdebcb82af888cd2d69801a6f0f@sns.ias.edu DTSTART:20111118T170000Z DTEND:20111118T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 UPDATED, "Journal Discussion" (Guilherme Pimentel, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1321637400a2ab91954be54c44daa917ba90b0d1a3@sns.ias.edu DTSTART:20111118T173000Z DTEND:20111118T183000Z SUMMARY:Princeton University Astroplasmas Seminar - ADDED, "Implications from Jet Breakout in Long GRBs: an Observational Imprint of the Collapsar Model, and the Fraction of Short GRBs" (Omer Bromberg, Tel Aviv University) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1321896600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111121T173000Z DTEND:20111121T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1321896600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111121T173000Z DTEND:20111121T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132190110013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111121T184500Z DTEND:20111121T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Fundamental Plane of Black Hole Activity" (Richard Plotkin, University of Amsterdam) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The paper that will be discussed is, "Using the Fundamental Plane of Black Hole Activity to Distinguish X-ray Processes from Weakly Accreting Black Holes," by Plotkin, et al. ( http://arxiv.org/abs/1105.3211 ) See the website for all information: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1105.3211 END:VEVENT BEGIN:VEVENT UID:132197760081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111122T160000Z DTEND:20111122T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Galactic-Scale Star Formation Rates: An Efficient Market" (Eve Ostriker, University of Maryland at College Park) DESCRIPTION:ABSTRACT: Recent surveys have established increasingly precise correlations between star formation rates (SFRs) and the gas, stellar, and dark matter contents of galaxies. Outer galactic disks are dominated by atomic gas and have steep Kennicutt-Schmidt (KS) relations. Mid-disks are dominated by molecular gas and have nearly linear KS relations. Starburst regions (in ULIRGs and high-z galaxies) are molecule-dominated and have steep KS relations. Recent data also confirm a pervasive inefficiency of gas consumption: for all regimes, the gas supply divided by the local dynamical time far exceeds the SFR. To understand these empirical relations, it is crucial to consider the ISM physics at scales small compared to the disk thickness, and the demands imposed by rapid gas cooling and dissipation of turbulence. Recently, we have developed theoretical models in which feedback from massive stars self-regulates SFRs, subject to local environmental conditions including the stellar and dark matter gravitational potentials. In equilibrium, the SFR adjusts until ISM heating balances cooling, total pressure balances gravity, and turbulent driving balances dissipation. These models are in remarkably good agreement with observations in all three regimes of star formation, and have been confirmed and calibrated using multiphase numerical hydrodynamic simulations. From this perspective, it is the high efficiency of massive-star feedback -- stellar UV and expanding SN remnants replenish thermal and turbulent energy in less than a dynamical time -- that enables low gas consumption and sustained star formation in disk galaxies. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1321983000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111122T173000Z DTEND:20111122T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132198300080418408aaf2e2191a2c1d9174ab4b15@sns.ias.edu DTSTART:20111122T173000Z DTEND:20111122T183000Z SUMMARY:Princeton University Geosciences Seminar, "Perspectives on the First Billion Years of Lunar Evolution from Geophysical Observations of Impact Structures" (Maria Zuber, Massachusetts Institute of Technology) DESCRIPTION: LOCATION:Guyot Hall, Room 10 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13220694001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111123T173000Z DTEND:20111123T183000Z SUMMARY:Princeton University Wunch Talk, "The Unseen Sources of Early Enrichment and Reionization: the Evolution of IGM CIV Density from z=6 to 5" (Roban Hultman Kramer, Swiss Federal Institute of Technology (ETH) Zurich) DESCRIPTION:ABSTRACT: In the near future, measurements of metal absorption features in the intergalactic medium (IGM) will become an important constraint on models of the formation and evolution of the earliest galaxies, the properties of the first stars, and the reionization and enrichment of the IGM. The first measurement of a metal abundance in the IGM at a redshift approaching the epoch of reionization already offers intriguing hints. Between z=5.8 and 4.7 (a 0.3 Gyr interval only 1 Gyr after the big bang), the measured density of CIV absorbers in the IGM increased by a factor of ~ 3.5 (Ryan-Weber et al. 2009; Becker, Rauch & Sargent 2009). If these values prove to be accurate, they pose two puzzles: (1) The total amount of CIV at z=5.8 implies too little star formation to reionize the IGM by z=6 or to match the WMAP electron scattering optical depth (tau). (2) The rapid growth from z = 6-5 is faster than the buildup of stellar mass or the increase in the star formation rate density over the same interval. We show that a delay of ~ 0.4-0.7 Gyr between the instantaneous production of ionizing photons and the later production of metal absorption features (added to the delay due to stellar lifetimes) can provide the full explanation for both puzzles. We calculate the delay in metal production due to finite stellar lifetimes alone and find that it is too short to explain the rapid CIV density increase. The additional delay could naturally be explained as the result of ~ 200 km/s outflows carrying carbon to distances of ~ 100 kpc, the typical distance between galaxies and CIV absorbers in enrichment simulations, and the typical outflow or absorption region scale observed at z ~ 2-3. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1322240400063aba9470734c24040cfcbf82c903e3@sns.ias.edu DTSTART:20111125T170000Z DTEND:20111125T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - EVENT CANCELLED DESCRIPTION:THERE WILL NOT BE A GRAVITY GROUP LUNCH ON NOVEMBER 25. LOCATION: COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1322501400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111128T173000Z DTEND:20111128T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "A 2% Measurement of the BAO in SDSS DR7 using Reconstruction" (Xiaoying Xu, University of Arizona) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: We demonstrate the first application of reconstruction on real observed galaxies in the SDSS DR7 luminous red galaxy catalogue. We also introduce more careful approaches to deriving a suitable covariance matrix and fitting model for galaxy correlation functions. These all aid in obtaining a more accurate measurement of the acoustic scale and its error. We validate our reconstruction, covariance matrix and fitting techniques on 160 mock catalogues derived from the LasDamas simulations in redshift space. We then apply these techniques to the DR7 LRG sample and find that the error on the acoustic scale decreases from ~3.4% before reconstruction to ~1.9% after reconstruction. This 40% reduction in the error is equivalent to the effect of increasing the survey volume by about a factor of 3. We also see an increase by at least 1-sigma in the significance of our BAO detection for 2 different measures of BAO significance. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1322501400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111128T173000Z DTEND:20111128T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132250590013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111128T184500Z DTEND:20111128T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Probing Galaxy Halos with COS" (Jenny Greene & Ed Jenkins, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. Three papers will be discussed: http://adsabs.harvard.edu/abs/2011arXiv1111.3982T, http://adsabs.harvard.edu/abs/2011arXiv1111.3980T, and http://adsabs.harvard.edu/abs/2011arXiv1111.3981L See the website for all information: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://adsabs.harvard.edu/abs/2011arXiv1111.3982T END:VEVENT BEGIN:VEVENT UID:1322506800370e370a4515ecd6cefb7831febcdf82@sns.ias.edu DTSTART:20111128T190000Z DTEND:20111128T200000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Discussion (General Discussion) DESCRIPTION:A bi-weekly discussion will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The location will alternate between Princeton University and the Institute for Advance Study. Check the group website for the Princeton University meeting location. Please e-mail Jose Prieto (jprieto at astro.princeton.edu) to be added to the e-mail list. See the web site for papers to be discussed. LOCATION:Institute for Advanced Study, Astrophysics Library COMMENT: URL:http://princetontransients.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:1322514000433014367aff1c4cab67719dedd69bb4@sns.ias.edu DTSTART:20111128T210000Z DTEND:20111128T220000Z SUMMARY:Princeton University Special Astrophysics Seminar, "Compact object encounters" (Stephan Rosswog, Jacobs University Bremen) DESCRIPTION: LOCATION:Princeton University, Room 33, Peyton Hall COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132258240081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20111129T160000Z DTEND:20111129T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Statistical Properties of the Population of Super-Earths and Neptune-type Planets" (Michel Mayor, University of Geneva) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1322587800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111129T173000Z DTEND:20111129T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132261480093ef6349b173c1b52b314de07169f9bb@sns.ias.edu DTSTART:20111130T010000Z DTEND:20111130T020000Z SUMMARY:Princeton University Louis Clark Vanuxem / Department of Astrophysical Sciences Public Lecture, "Delusions of Space Enthusiasts" (Neil DeGrasse Tyson, Hayden Planetarium) DESCRIPTION:Cosponsored by the Louis Clark Vanuxem Lecture Fund and the Department of Astrophysical Sciences. In this illustrated talk, Neil deGrasse Tyson will explore the perennial mismatch between collective expectations of where we should be in space by now and the geopolitical, cultural, and economic realities that limit it. Neil DeGrasse Tyson is an astrophysicist, director of the Hayden Planetarium, and host and executive editor the the PBS NOVA scienceNow TV show. His research interests include star formation, exploding stars, dwarf galaxies, and the structure of the Milky Way. The author of several volumes, his book Space Chronicles: Facing the Ultimate Frontier reflects on the discrepancy between the publics vision of space exploration and the factors that thwart progress in that field. From 1994 to 2003 Tyson was a visiting research scientist and lecturer at Princeton University. Lectures are free and open to the public. LOCATION:Princeton University, McCosh Hall, Room 50 COMMENT: URL:http://lectures.princeton.edu/2011/neil-degrasse-tyson/ END:VEVENT BEGIN:VEVENT UID:13226742001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111130T173000Z DTEND:20111130T183000Z SUMMARY:Princeton University Wunch Talk, "Hearing and Seeing the Violent Universe" (Samaya Nissanke, California Institute of Technology) DESCRIPTION:ABSTRACT: The strongest gravitational waves in the universe are attributed to violent events such as the mergers of neutron star or black hole binaries. Decades of theoretical and experimental efforts are about to culminate perhaps within the next five years in the first direct detection of gravitational waves. These resulting measurements will offer us an unprecedented view of strong-field gravity in action. I will discuss my ongoing effort aimed at preparing astrophysical follow-up studies of potentially upcoming gravitational wave events. Such follow-up using optical, gamma-ray and radio surveys and telescopes are critical for improving our understanding of the sources' physics. In particular, I will outline the challenges that lie ahead in pinpointing the sky location of neutron star binary mergers using worldwide networks of gravitational-wave interferometers and electromagnetic synoptic wide-field surveys. Also, I will show how joint gravitational wave and electromagnetic observations of neutron star binaries will provide constraints on fundamental cosmological parameters such as H_0 to an accuracy of a few percent, independent of the cosmological distance ladder. Overall, I will demonstrate the importance and promise of future gravitational wave and electromagnetic observations in enhancing our understanding of the physics underlying violent cosmic events and the universe itself. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1322755200ac84066c0ce7f864942940adb6d5a65f@sns.ias.edu DTSTART:20111201T160000Z DTEND:20111201T173000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar - ADDED, "Roche Accretion Of Stars Close To Massive Black Holes" (Lixin (Jane) Dai, Stanford University) DESCRIPTION:ABSTRACT: We consider the Roche accretion in an Extreme Mass-Ratio Inspiral (EMRI) binary system formed by a star orbiting a massive black hole. The ultimate goal is to constrain the mass and spin of the black hole and confirm general relativity in the strong-field regime from the resulted quasi-periodic signals. Before accretion starts, the star orbits the hole in a circular, equatorial stellar orbit, which shrinks due to gravitational radiation. If the inspiralling star fills its Roche lobe outside the Innermost Stable Circular Orbit (ISCO) of the hole, gas will flow through the inner Lagrange point to the hole. If this mass-transfer happens on a time scale faster than the thermal time scale but slower than the dynamical time scale, the star will evolve adiabatically, and, in most cases, will recede from the hole. We calculate how the stellar orbits and mass-transfer rates will change as various types of stars are tidally stripped in the relativistic regime, and discussed the stability during the process. We envisage that the mass stream eventually hits the accretion disc, where it forms a hot spot orbiting the hole and may ultimately modulate the luminosity with the stellar orbital frequency. The observability of such a modulation is discussed along with possible interpretation of an intermittent 1 hour period in the X-ray emission of RE J1034+396. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13227750002cd0bffc57d27bc471a5e73716bfe656@sns.ias.edu DTSTART:20111201T213000Z DTEND:20111201T223000Z SUMMARY:Princeton University Department of Physics Colloquium - CANCELED DESCRIPTION: LOCATION: COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:132284520022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20111202T170000Z DTEND:20111202T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "Roche Accretion Of Stars Close To Massive Black Holes" (Lixin (Jane) Dai, Stanford University) DESCRIPTION:ABSTRACT: We consider the Roche accretion in an Extreme Mass-Ratio Inspiral (EMRI) binary system formed by a star orbiting a massive black hole. The ultimate goal is to constrain the mass and spin of the black hole and confirm general relativity in the strong-field regime from the resulted quasi-periodic signals. Before accretion starts, the star orbits the hole in a circular, equatorial stellar orbit, which shrinks due to gravitational radiation. New fitting formulae are presented for the inspiral time and the radiation-reaction torque in the relativistic regime. If the inspiralling star fills its Roche lobe outside the Innermost Stable Circular Orbit (ISCO) of the hole, gas will flow through the inner Lagrange point (L1) to the hole. We give new relativistic interpolation formulae for the volume enclosed by the Roche lobe. If this mass-transfer happens on a time scale faster than the thermal time scale but slower than the dynamical time scale, the star will evolve adiabatically, and, in most cases, will recede from the hole filling its Roche lobe. We calculate how the stellar orbital period and mass-transfer rate will change through the Roche evolution for various types of stars in the relativistic regime. We envisage that the mass stream eventually hits the accretion disc, where it forms a hot spot orbiting the hole and may ultimately modulate the luminosity with the stellar orbital frequency. The observability of such a modulation is discussed along with possible interpretation of an intermittent 1 hour period in the X-ray emission of RE J1034+396. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1322849700d8d72a0c4975647363095d9277c152bb@sns.ias.edu DTSTART:20111202T181500Z DTEND:20111202T191500Z SUMMARY:Princeton University Astroplasmas Seminar - ADDED - NOTE TIME, "Rotation, Twist, and Reconnection: Simulations of Pulsar and Magnetar Magnetospheres" (Kyle Parfrey, Columbia University) DESCRIPTION:Abstract: Compact objects are naturally surrounded by highly-conducting magnetically-dominated plasma, the behavior of which may be responsible for some of the most extreme, and puzzling, phenomena in astrophysics. I will describe a new pseudospectral code for MHD simulations in the force-free (ultra-relativistic) limit, and show applications to two such problems: the pulsar magnetosphere and magnetar giant flares. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1323106200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111205T173000Z DTEND:20111205T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1323106200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111205T173000Z DTEND:20111205T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "The Phenomenology of Light Gravitino Dark Matter" (Samuel Lee, California Institute of Technology / Johns Hopkins University) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. ABSTRACT: I will discuss some work on the collider phenomenology and cosmology of light gravitino dark matter, and will touch on some related issues concerning infrared divergences in charged-particle decay at finite temperature. Light gravitinos, with mass in the eV to MeV range, are well-motivated in particle physics, but their status as dark-matter candidates is muddled by early-Universe uncertainties. Upcoming data from colliders may clarify this picture. Light-gravitino collider events should result in spectacular signals, including di-photons, delayed and non-pointing photons, kinked charged tracks, and heavy metastable charged particles. Remarkably, collider data is also well suited to distinguish between currently viable light-gravitino cosmological scenarios, with interesting implications for early-Universe cosmology. Finally, the process of charged-particle decay in the early Universe is important in light-gravitino production, and may also be relevant in other particle-astrophysics scenarios. I will examine the cancellation of power-like infrared divergences that arise at finite temperature, and will discuss some possible implications for such scenarios. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:13231872004562fc520a9491d6436cbacbe21e86ec@sns.ias.edu DTSTART:20111206T160000Z DTEND:20111206T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar - LOCATION CHANGE, "Formalism and Function with the CMB" (Marc Kamionkowski, Johns Hopkins University) DESCRIPTION: LOCATION:Bloomberg Hall Physics Library - NOTE CHANGE COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1323192600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20111206T173000Z DTEND:20111206T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13232790001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111207T173000Z DTEND:20111207T183000Z SUMMARY:Princeton University Wunch Talk, "Insights into Massive Elliptical Galaxy Formation with VIRUS-P" (Jeremy Murphy, McDonald Observatory, University of Texas at Austin) DESCRIPTION:ABSTRACT: The development of new instrumentation and large-scale observing campaigns over the past 15 years have allowed several significant advancements in our understanding of the formation and evolution of galaxies. Along with observational advances, exponential growth in computational power has allowed simulations to make robust and testable predictions of the mechanisms and timescales of galaxy formation. I will discuss two projects I am currently involved in that employ the VIRUS-P integral field spectrograph to add significant new information towards clarifying our picture of galaxy formation. Specifically, I will detail how we are using VIRUS-P to measure both the stellar kinematics and stellar chemical composition of the most massive elliptical galaxies in the local universe to large radial distances (our integral field data extends to 2 effective radii (R_e) for the entire galaxy sample and typically up to 3 - 5 R_e). This extended spatial coverage proves critical in constraining the dark matter halo, the formation timescales and the role major and minor mergers play in the growth of massive elliptical galaxies. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1323365400fff9088eef484bdf825b544eadfb9395@sns.ias.edu DTSTART:20111208T173000Z DTEND:20111208T183000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Discussion - NOTE DATE & TIME (General Discussion) DESCRIPTION:A bi-weekly discussion will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The location will alternate between Princeton University and the Institute for Advance Study. Check the web site for the location. Please e-mail Jose Prieto to be added to the e-mail list. See the web site for papers to be discussed. LOCATION:Princeton University, Peyton Hall. Room 140 COMMENT: URL:http://princetontransients.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:13233798008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111208T213000Z DTEND:20111208T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Taking a 'nu' Look: Studying Low Energy Solar and Terrestrial Neutrinos with Borexino" (Alex Wright, Princeton University) DESCRIPTION:ABSTRACT: "Solar neutrino experiments have taught us a great deal about neutrinos, neutrino oscillations, and the nuclear fusion reactions that power the sun. The Borexino experiment, in which the Princeton particle astrophysics group plays a leading role, has made important new solar neutrino measurements by extending neutrino spectroscopy to very low energies. In this talk I will review what we have learned (and are still learning!) about solar neutrinos and the Sun. I will also describe our first measurement of the flux of terrestrially produced "geo-neutrinos" and how this and similar measurements can allow us to study the chemical composition of the Earth's interior and to better understand the planet's thermal history. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:13234500009eedebeac6c7ae1289525459797793f0@sns.ias.edu DTSTART:20111209T170000Z DTEND:20111209T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 1, "ACTPol: An Instrument for Small-scale CMB Polarization Observations" (Emily Grace, Princeton University Physics grad student) DESCRIPTION:ABSTRACT: ACTPol is a polarization sensitive upgrade to the Atacama Cosmology Telescope which aims to probe the small scale polarization anisotropy of the CMB, a signal which promises to constrain the sum of the neutrino masses and the dark energy equation of state. I will present the design and development of the ACTPol instrumentation. The new receiver will contain three optics tubes each consisting of three large cryogenic silicon lenses. The three arrays, two at 150 GHz and one at 90 GHz, are each composed of ~1000 feedhorn-coupled transition-edge sensor bolometer detectors. The focal plane will be cooled to an operating temperature of ~100 mK using a pulse-tube backed dilution refrigerator. The first 150 GHz array is scheduled to deploy in 2012. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:13234500006b0c4bcb1703266d5602235b7918440d@sns.ias.edu DTSTART:20111209T170000Z DTEND:20111209T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 2, "Journal Discussion" (Jon Gudmundsson, Princeton University Physics grad student) DESCRIPTION: LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1323450000aecce4a0de10944a264ea1445ad4dc3e@sns.ias.edu DTSTART:20111209T170000Z DTEND:20111209T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - Speaker 3 Topic/Paper Added, "Journal Discussion - Testing the Kerr Black Hole Hypothesis" (Hans Bantilan, Princeton University Physics grad student) DESCRIPTION:See the link to the paper to be discussed. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://arxiv.org/abs/1109.4256 END:VEVENT BEGIN:VEVENT UID:132346080083d32189cee9a9efdf2efc204b97caf9@sns.ias.edu DTSTART:20111209T200000Z DTEND:20111209T210000Z SUMMARY:Princeton University Department of Physics Astroparticle Seminar - ADDED, "Design, Realization and Operation of Prototype Liquid ArgonTime Projection Chambers for Future Large-size" (Biagio Rossi, Swiss Federal Institute of Technology Zurich (ETHZ)) DESCRIPTION: LOCATION:Jadwin Hall, Room A06 COMMENT: URL:http://www.princeton.edu/physics/events/ END:VEVENT BEGIN:VEVENT UID:1323711000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111212T173000Z DTEND:20111212T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Dissipative Effects in the Effective Field Theory of Inflation" (Diana Nacir, Universidad de Buenos Aires, Argentina) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. ABSTRACT: In this talk I will summarize a recent article arXiv:1109.4192v1 [hep-th] (co-authors: R. Porto, L. Senatore, and M. Zaldarriaga) where we generalized the effective field theory (EFT) of single clock inflation proposed in JHEP 0803:014 (2008) to include dissipative effects. After some motivations and a brief summary of the EFT of inflation I will describe the inflationary scenarios we focus on and how we include the influence of additional degrees of freedom (ADOF) on the dynamics of the perturbations of the clock (which we called $\pi$ field) within the EFT framework. Then, I will discuss under which circumstances a large friction term of the form $\gamma\dot{\pi}$ leads to an increased level of non-gaussianities. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1323711000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20111212T173000Z DTEND:20111212T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13237110004a686bbfedbf470b01ec949f0a4f9907@sns.ias.edu DTSTART:20111212T173000Z DTEND:20111212T183000Z SUMMARY:Princeton University Princeton Institute for Computational Science and Engineering Colloquium, "Campus-Scale High Performance Cyberinfrastructure for Data-Intensive Research" (Larry Smarr, Calit2, University of California, San Diego) DESCRIPTION:ABSTRACT: Campuses are experiencing an enormous increase in the quantity of data generated by scientific instruments and computational clusters and stored in massive data repositories. The shared Internet, engineered to enable interaction with megabyte-sized data objects is not capable of dealing with the typical gigabytes to terabytes of modern scientific data. Instead, a high performance cyberinfrastructure is emerging to support data-intensive research. Fortunately, multi-channel optical fiber can support both the traditional internet and this new data utility. I will give examples of early prototypes which integrate data generation, transmission, storage, analysis, visualization, curation, and sharing, driven by applications as diverse as genomics, ocean observatories, and cosmology. LOCATION:138 Lewis Science Library COMMENT:Lunch served at 11:45 am in PICSciE reception area, 300 Lewis Science Library. URL:http://www.princeton.edu/researchcomputing END:VEVENT BEGIN:VEVENT UID:132371550013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20111212T184500Z DTEND:20111212T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "AMR Simulations of Galaxy Formation" (Cameron Hummels, Discussion Leader, Columbia University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The paper to be read is "Adaptive Mesh Refinement Simulations of Galaxy Formation: Exploring Numerical and Physical Parameters", by Cameron Hummels, Greg Bryan, http://arxiv.org/abs/1112.0009 . The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1112.0009 END:VEVENT BEGIN:VEVENT UID:132379200089b3dbe817fb759dd4cfa3f2ae6712a7@sns.ias.edu DTSTART:20111213T160000Z DTEND:20111213T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar - CANCELED DESCRIPTION: LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13238028004607ab693901742ad6005f4aff861b83@sns.ias.edu DTSTART:20111213T190000Z DTEND:20111213T200000Z SUMMARY:Institute for Advanced Study Bahcall Lunch - CANCELED DESCRIPTION: LOCATION: COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13238064003b47ee7a39d317ab61b310ce37294b89@sns.ias.edu DTSTART:20111213T200000Z DTEND:20111213T210000Z SUMMARY:Princeton University Department of Physics Astroparticle Seminar, "First Measurement of Cosmic Ray Composition Using the IceCube Neutrino Observator" (Karen Andeen, Rutgers the State University of New Jersey) DESCRIPTION:ABSTRACT: The recently completed IceCube Neutrino Observatory instruments a volume of roughly one cubic kilometer (one gigaton) of Antarctic ice with more than 5000 digital optical modules. While IceCube was primarily designed to detect high energy neutrinos, the overwhelming majority of events are caused by downing cosmic-ray induced muons. These muons, when measured in coincidence with events from the IceTop air shower array on the surface of the icecap, provide an indirect measurement of the cosmic ray primary particle, mediated by the physics of air shower propagation.These measurements, in conjunction with detailed simulations of the air showers interacting with our detector and a neural-network analysis technique, can be used to precisely measure the cosmic ray energy spectrum and composition at energies near and above the "knee"--a critical feature in the spectrum where the spectral index steepens. The results of the first coincident analysis from IceCube and IceTop will be presented. LOCATION:Jadwin Hall, Room A06 COMMENT: URL:http://www.princeton.edu/physics/events/ END:VEVENT BEGIN:VEVENT UID:13238118008fdf066d3bc787ebcd1e3da0613bd323@sns.ias.edu DTSTART:20111213T213000Z DTEND:20111213T223000Z SUMMARY:Princeton University Astrophysical Sciences Special Seminar, "Solar Coronagraphy" (Claude Aime, Universite de Nice, France) DESCRIPTION:ABSTRACT: The intensity of the solar corona in the visible light is about one-millionth of that of the photosphere, and for a long time before Lyot's invention of the coronagraph in the thirties, the corona was only observed during eclipses. Because the Sun is an extended object, most of the coronagraphic techniques recently developed for exoplanet detection cannot be used for the solar corona. Currently, only external occulters simulating an eclipse and the coronagraph of Lyot are used. At the university of Nice, we have studied the possibility of using apodized apertures to observe the solar corona very close to the limb. Ideally, the underlying aperture is a circular pupil without central obstruction. It was first proposed (Aime, 2007) to use for the transmission prolate spheroidal functions that are optimal for the detection of exoplanets. Further numerical simulations showed that Sonine functions (of the form (1 - r2)s, with s>1), were better apodizers than prolates for observing the corona. The reason is that Sonine functions have steeper slopes of diffraction wings at long distances compared with prolate functions. Apodized apertures can be used alone, or in conjunction with a Lyot coronagraph. Only very strong apodizations are efficient. The optimal transmission shape remains to be defined theoretically. The problem we are facing is the realization of an apodizer. The apodizer should not substitute strong diffusion effects to the diffraction it suppresses. An attempt was made to make a variable transmission plate at the Observatoire de Nice, but because of many experimental difficulties and a hardware failure the making of the apodizer is now in stand-by. Until an ideal apodization plate can be realized, we propose to use shaped apertures, i.e. a pupil of uniform transmission with a suitable contour. Jacquinot firstly proposed these apertures more than half a century ago for the analysis of faint spectral lines. These shaped apertures have been studied for exoplanet detection. The Sun, because it is an extremely extended object, imposes particularly strong constraints on these shaped apertures. We propose to use an aperture shaped as a cats eye, more precisely an aperture with a contour of the form y(x)= a (1 x2)s. The optimal value for a is not yet defined, but we must have a<<1. The high angular resolution is recovered in the long direction only of the cats eye one-dimensional slit aperture. A rotation of the diaphragm in front of the aperture is necessary for complete 2D coverage of the solar corona. Post processing will be needed to recover a two-dimensional image of the solar corona. LOCATION:Peyton Hall, Room 201 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13238838001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20111214T173000Z DTEND:20111214T183000Z SUMMARY:Princeton University Wunch Talk, "Orbital and Structural Evolution of Highly Irradiated Planets" (Konstantin Batygin, California Institute of Technology) DESCRIPTION:ABSTRACT: Long-term orbital evolution of multi-planet systems under tidal dissipation often converges to a dynamical fixed point. The fixed point is characterized by apsidal alignment among the orbits and lack of variations in the orbital eccentricities. Quantitatively, the nature of the fixed point is dictated by mutual interactions among the planets as well as non-Keplerian effects. The important non-Keplerian effects are general relativity, which dominates for sub-giant planets, and gravitational quadropole fields created by the inner-most planet's tidal and rotational distortions, which dominate for giant planets. If a roughly coplanar, non-transiting system hosts a hot, sub-Saturn mass planet, and is tidally relaxed, separation of planet-planet interactions and non-Keplerian effects in the equations of motion leads to a direct determination of the true masses of the planets. In other words, a "snap-shot" observational determination of the orbital state resolves the sin(I) degeneracy, and opens up a direct avenue towards identification of the true lowest-mass exo-planets detected by radial velocity. On the other hand, in systems where the interior planet is a transiting gas-giant, its fixed-point orbital eccentricity is a strong function of the planet's interior structure and its precise determination can provide an unprecedented probe into the interior structure of an extrasolar planet. Such calculations provide the constraints, needed to understand the degree of interior heating required to explain inflated hot Jupiter radii. I will conclude by discussing Ohmic dissipation as a viable mechanism for inflation of extrasolar gas giants. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1323891000a6d9a8115bdba234ae0fbcaa1240d0a6@sns.ias.edu DTSTART:20111214T193000Z DTEND:20111214T203000Z SUMMARY:Institute for Advanced Study Astrophysics Blackboard Talk- ADDED, "Some Neat Stuff About Kerr Geodesics" (Gabe Perez-Giz, New York University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13239846008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20111215T213000Z DTEND:20111215T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Statistical Mechanics of the Genetic Code: a Glimpse of Early Life?" (Nigel Goldenfeld, University of Illinois at Urbana-Champaign) DESCRIPTION:ABSTRACT: Relics of early life, preceding even the last universal common ancestor of all life on Earth, are present in the structure of the modern day canonical genetic code. In this talk, I will draw attention to these relics, and discuss their interpretation from the perspective of the dynamical system that is evolution. I will argue that this viewpoint, and the quantitative, statistical dynamical calculations that it entails, suggest a natural scenario in which evolution exhibits three distinct dynamical regimes, differentiated respectively by the way in which information flow, genetic novelty and complexity emerge. Possible observational signatures of these predictions are discussed. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:132405480022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20111216T170000Z DTEND:20111216T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "CMB Polarization Results from the QUIET Experiment" (Immanuel Buder, Kavli Institute for Cosmological Physics, University of Chicago) DESCRIPTION:ABSTRACT: Inflationary cosmology postulates that the Universe underwent a period of accelerated expansion in the first $10^{-30}$,s after the Big Bang. Inflationary models are attractive because they solve outstanding problems in cosmology: the origin of structure, the absence of monopoles, and the horizon and flatness problems. Although inflation is consistent with existing data, the fundamental physics responsible for it is unknown. Cosmic Microwave Background (CMB) measurements promise to verify one of the predictions of inflation: odd-parity polarization modes (B modes). CMB B modes have not yet been detected. I will describe the QUIET instrument, how it mitigates systematic contamination, and results from the first season of observation at 43 GHz. QUIET sets one of the best limits to date on inflationary B modes (r < 2.2). Moreover the unique QUIET design leads to the lowest levels of systematic contamination in the inflationary signal reported by any CMB polarization experiment. This suppression of systematic errors demonstrates the technology for a next-generation experiment. I will also report the status of analysis of the QUIET second-season 95-GHz data. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT: URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1324315800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20111219T173000Z DTEND:20111219T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. PLEASE NOTE: The Institute Dining Hall lunch schedule will be a bit different on Monday, Dec 19 because of a staff holiday luncheon that day. The IAS Dining Hall will be open to Members/Visitors only from 11:30 - 12:30. Therefore, for the Cosmology Lunch meeting that day, we would like to ask that meeting participants who go through our lunch line and bring food over to the meeting be told to please ask for "to go" containers and a bag to carry their food in. That way, when they are done they can just put their trash in the cans provided in West Seminar, since it will be difficult to try to return trays to the Dining Hall during the staff holiday lunch. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT:The IAS Dining Hall will be open to Members/Visitors only from 11:30 - 12:30. PLEASE ASK FOR "TO GO" CONTAINERS AND A PLASTIC BAG TO CARRY YOUR LUNCH IN. URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:13243158008fdf066d3bc787ebcd1e3da0613bd323@sns.ias.edu DTSTART:20111219T173000Z DTEND:20111219T183000Z SUMMARY:Princeton University Astrophysical Sciences Special Seminar, "The Turbulent Atmospheres of Planet-Forming Disks" (Neal Turner, Jet Propulsion Laboratory / California Institute of Technology) DESCRIPTION: LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132449310053195bb8b463b3e3c6dcfffd757e2836@sns.ias.edu DTSTART:20111221T184500Z DTEND:20111221T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] - NOTE DAY, "VVV Survey: The Milky Way Bulge with VISTA" (Dante Minniti, Discussion Leader, Pontificia Universidad Catolica de Chile) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . The paper to be discussed is, "VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea", by Saito, et al. The link is listed below. LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1111.5511 END:VEVENT BEGIN:VEVENT UID:1325692800da3dc8b36dd83ff4c6e85803bbc49b03@sns.ias.edu DTSTART:20120104T160000Z DTEND:20120104T170000Z SUMMARY:Princeton University Special Talk - TIME UPDATED, "The POLARBEAR Experiment" (Zigmund Kermish, University of California, Berkeley) DESCRIPTION:ABSTRACT: We present the design and characterization of the POLARBEAR experiment. POLARBEAR will measure the B-mode polarization of the cosmic microwave background (CMB) on angular scales ranging from the experiments 4 beam size to several degrees. The experiment utilizes a unique focal plane of 1,274 antenna-coupled, polarization sensitive transition-edge sensor (TES) bolometers cooled to 250 milli-Kelvin. Employing this focal plane along with stringent control over systematic errors, POLARBEAR is designed to detect the expected small scale signal due to gravitational lensing and search for the large scale signal from inflationary gravitational waves. POLARBEAR was assembled for an engineering run in the Inyo Mountains of California in 2010 and is currently being deployed to the Atacama Desert in Chile. An overview of the instrument is presented along with characterization results from the California engineering run and the status of the Chilean deployment. LOCATION:Jadwin Hall, Room A06 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1325779200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120105T160000Z DTEND:20120105T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Magnetorotational-Instability-Driven Accretion in Protoplanetary Disks" (Xuening Bai, Princeton University) DESCRIPTION:ABSTRACT: Magnetohydrodynamic (MHD) turbulence driven by the magnetorotational instability (MRI) has long been considered as the most promising mechanism for transporting angular momentum in accretion disks. In protoplanetary disks (PPDs), however, the gas dynamics is strongly affected by non-ideal MHD effects such as Ohmic resistivity, Hall effect and ambipolar diffusion (AD) due to its weak ionization level. Most MRI calculations for PPDs done so far consider only the Ohmic resistivity, while Hall and AD effects dominate the surface and outer regions of PPDs but remain poorly explored. We perform 3D unstratified shearing-box MRI simulations with AD using a variety of magnetic field geometries and AD coefficients. We find that angular momentum transport becomes inefficient when the neutral-ion collision frequency falls below the orbital frequency. Moreover, sustained MRI turbulence requires weak magnetic field in the AD dominated regime. We present a general framework that incorporate these constraints together to predict the MRI-driven accretion rate and the corresponding magnetic field strength in PPDs. Our results indicate that MRI alone has difficulty in accounting for the observed accretion rate in a large fraction of PPDs, while angular momentum transport by magnetized wind may be a viable solution. On the other hand, for transitional disks, characterized by inner gaps or holes representing a later stage of PPD evolution, we find that MRI is able to drive sufficiently rapid accretion consistent with observations, and the presence of tiny grains even promotes accretion. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1325865600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120106T160000Z DTEND:20120106T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "A Global Model for Galaxy Evolution: Simplicity and its Consequences" (Yingjie Peng, Swiss Federal Institute of Technology Zurich (ETH Zurich)) DESCRIPTION:ABSTRACT: The galaxy population appears to be composed of infinitely complex different types and properties at first sight. However, when large samples of galaxies are studied, it appears that the vast majority of galaxies just follow simple scaling relations and similar evolutional modes while the outliers represent some minority. We demonstrate the astonishing underlying simplicities of the galaxy population emerged from large surveys and take a new approach to the topic of galaxy evolution and derive the analytical forms for the dominant evolutionary processes that control the galaxy evolution. This model successfully explained the observed evolution of the galaxy stellar mass functions (GSMF) of both passive and star-forming galaxies and the origin of the Schechter form of the GSMF. The model also offers natural explanations for the anti-hierarchical age-mass relation and the alpha-enrichment patterns for passive galaxies and makes many other testable predictions, such as the mass function of the population of transitory objects that are in the process of being quenched, the galaxy major- and minor-merger rates, the galaxy stellar mass assembly history, star formation history etc. Although still purely phenomenological, the model makes clear what the evolutionary characteristics of the relevant physical processes must in fact be. This model thus offers a new powerful analytical framework to study galaxy evolution and to explore a number of crucial issues and questions in galaxy evolution. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1326130200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120109T173000Z DTEND:20120109T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Newtonian and Relativistic Cosmologies" (Stephen Green, University of Chicago) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. ABSTRACT: Cosmological N-body simulations are now being performed using Newtonian gravity on scales larger than the Hubble radius. It is well known that a uniformly expanding, homogeneous ball of dust in Newtonian gravity satisfies the same equations as arise in relativistic FLRW cosmology, and it also is known that a correspondence between Newtonian and relativistic dust cosmologies continues to hold in linearized perturbation theory in the marginally bound/spatially flat case. Nevertheless, it is far from obvious that Newtonian gravity can provide a good global description of an inhomogeneous cosmology when there is significant nonlinear dynamical behavior at small scales. We investigate this issue in the light of a perturbative framework that we have recently developed, which allows for such nonlinearity at small scales. We propose a relatively straightforward "dictionary"--- which is exact at the linearized level---that maps Newtonian dust cosmologies into general relativistic dust cosmologies, and we use our "ordering scheme" to determine the degree to which the resulting metric and matter distribution solve Einstein's equation. We find that Einstein's equation fails to hold at "order 1" at small scales and at "order epsilon" at large scales. We then find the additional corrections to the metric and matter distribution needed to satisfy Einstein's equation to these orders. While these corrections are of some interest in their own right, our main purpose in calculating them is that their smallness should provide a criterion for the validity of the original dictionary (as well as simplified versions of this dictionary). We expect that, in realistic Newtonian cosmologies, these additional corrections will be very small; if so, this should provide strong justification for the use of Newtonian simulations to describe relativistic cosmologies, even on scales larger than the Hubble radius. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1326384000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120112T160000Z DTEND:20120112T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Liquid Water Oceans on Sub-Neptune Exoplanets" (Leslie Rogers, Massachusetts Institute of Technology) DESCRIPTION:ABSTRACT: The presence of liquid water has been hypothesized as an important ingredient for planet habitability. A sub-Neptune mass planet with a liquid water ocean below a hydrogen-rich envelope is an intriguing prospect. If the planet transits, its atmosphere could be amenable to characterization with transmission spectroscopy. A practical method to assess whether a transiting sub-Neptune planet could potentially harbor a liquid water ocean is needed. With interior structure models, I explore the conditions needed to reach pressures and temperatures conducive to liquid water at the planet surface. I apply this approach to constrain the prospects for liquid water oceans on GJ1214b and Kepler-22b. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1326735000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120116T173000Z DTEND:20120116T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "Simone Ferraro Talk Followed by General Discussion" (Simone Ferraro, Princeton University) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1326735000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120116T173000Z DTEND:20120116T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1326736800c26dc215c9a84a4bb2135f1ffa68ecfb@sns.ias.edu DTSTART:20120116T180000Z DTEND:20120116T193000Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Theory Seminar - NOTE DAY & TIME, "Spontaneous Generation of Turbulence in Magnetic Reconnection" (William Daughton, Los Alamos National Laboratory) DESCRIPTION:Non-PPPL visitors should contact Jennifer Jones, jjones "at" pppl.gov, for admission instructions. ABSTRACT: In space and astrophysical plasmas, magnetic reconnection occurs most commonly in parameter regimes where collisions are weak and where the macroscopic scales are much larger than the underlying kinetic scales. While progress has been made in understanding certain features of collisionless reconnection within 2D models, very little is know regarding the influence of realistic 3D dynamics. In this talk, a combination of linear Vlasov theory and petascale kinetic simulations are employed to examine the 3D evolution of reconnection layers with a finite guide field. This configuration is unstable to tearing modes at resonant surfaces across the initial layer corresponding to oblique angles relative to the 2D models, which permit only a single resonant surface. In real 3D systems, magnetic islands correspond to extended flux ropes, which can evolve and interact in a variety of complex ways not possible in 2D models. To examine this physics, we employ the 3D particle-in-cell code VPIC running on the Jaguar machine. These simulations feature the formation and interaction of flux ropes within the initial current layer, followed by the generation of secondary flux ropes within new current sheets that develop nonlinearly. For sufficiently large systems, this gives rise to a turbulent evolution in which flux ropes and current sheets are the basic building blocks. Examples are given for parameter regimes relevant to the Earths magnetosphere, as well as electron-positron plasmas of relevance to astrophysical applications. LOCATION:Princeton Plasma Physics Laboratory, Theory Seminar Room (T169) COMMENT: URL:http://w3.pppl.gov/theory/Seminars2011.html END:VEVENT BEGIN:VEVENT UID:1326825000838d685360f8cde01a5300f37812aecc@sns.ias.edu DTSTART:20120117T183000Z DTEND:20120117T193000Z SUMMARY:Princeton University Astrophysical Sciences Special Talk - ADDED, "Extended Lyman-alpha Emission from Cold Accretion Streams" (Joakim Rosdahl, Observatoire de Lyon) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1326834900b99c3ffe960b16e1650f8f1fc432b744@sns.ias.edu DTSTART:20120117T211500Z DTEND:20120117T221500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia - NOTE DAY, "Solar Probe Plus: Instruments for a Solar Encounter Mission" (Justin C. Kasper, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 4:00 pm, seminar is at 4:15 pm. ABSTRACT: Arguably the most significant open question in heliophysics is the identification of the physical processes responsible for sustaining the solar corona at millions of degrees and for heating the solar wind as it expands into interplanetary space. The ultimate source of this energy is the convective motion of the surface of the photosphere and its embedded magnetic field, but the mechanisms by which the large scale and low frequency motion of the field is able to dissipate sufficient heat in the corona and solar wind have not been conclusively identified. The NASA Solar Probe Plus mission will address these questions by plunging into the solar corona and obtaining the first direct measurements of the plasma of the extended solar atmosphere. This talk will discuss the Solar Probe Plus mission, with a focus on science goals and the design of plasma instruments capable of both making the necessary measurements and of surviving the solar encounters. LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT: URL:http://www.pppl.gov/colloquia.cfm END:VEVENT BEGIN:VEVENT UID:132690780061fa63f3042db5abb158199edd76ea35@sns.ias.edu DTSTART:20120118T173000Z DTEND:20120118T183000Z SUMMARY:Princeton University Wunch Talk - ADDED, "Integral Field Systems for Integral Field Spectroscopy" (Robert Content, Durham University) DESCRIPTION:ABSTRACT: Integral field spectroscopy has revolutionised the field of spectroscopy in the past 15 years by permitting to get the spectrum of each point in a 2-D image instead of only along a slit. A lot more light is collected in the same observing time than if the sky was scanned with the slit. I will review the 4 groups of integral field systems highlighting the critical innovations I developped in each group. The 4 groups are:- Microlens array units.- Fibre-lenslet units.- Image slicers.- Adaptive spectral sampling spectrographs.I will especially describe the last group which is the least known while being the most powerfull. In these spectrographs, a slicing system in the spectrum focal plane splits the spectrum into custom bandwidths or group of bandwidths. On the detector, there is a series or images of the original image, one for each bandwidth or group of bandwidths. This permits to get on the detector precisely the needed information while deleting the useless part of the spectrum and avoiding useless high resolution in the parts of the spectrum where they are not needed. The saved space on the detector permits a considerably larger field of view. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1326920400f52cdb8cd47f9afa46b6a8b97ebe283a@sns.ias.edu DTSTART:20120118T210000Z DTEND:20120118T220000Z SUMMARY:Institute for Advanced Study School of Mathematics Working Group on Symplectic Dynamics, "Nonregularizability of the Big Bang Singularity Using Blow Up" (Ed Belbruno, Courant Institute, New York University) DESCRIPTION: LOCATION:Simonyi Hall, S-101 COMMENT: URL:http://www.math.ias.edu/node/4040 END:VEVENT BEGIN:VEVENT UID:1326994200fff9088eef484bdf825b544eadfb9395@sns.ias.edu DTSTART:20120119T173000Z DTEND:20120119T183000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Discussion - NOTE DATE & TIME (General Discussion) DESCRIPTION:A bi-weekly discussion will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The location will alternate between Princeton University and the Institute for Advance Study. Check the web site for the location. Please e-mail Jose Prieto to be added to the e-mail list. See the web site for papers to be discussed. LOCATION:Institute for Advanced Study, Bloomberg Hall, Astrophysics Library COMMENT: URL:http://princetontransients.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:1327080600a2ab91954be54c44daa917ba90b0d1a3@sns.ias.edu DTSTART:20120120T173000Z DTEND:20120120T183000Z SUMMARY:Princeton University Astroplasmas Seminar - ADDED, "Physical Processes at Violent Low Density Reconnections" (Pin Wu, University of Delaware) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1327339800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120123T173000Z DTEND:20120123T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1327339800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120123T173000Z DTEND:20120123T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132734430013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120123T184500Z DTEND:20120123T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "STAGES Spiral Galaxies" (Stephanie Tonnesen, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . The papers to be discussed are: http://adsabs.harvard.edu/abs/2012MNRAS.419..669M and http://adsabs.harvard.edu/abs/2007ApJ...659.1138M . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://adsabs.harvard.edu/abs/2012MNRAS.419..669M END:VEVENT BEGIN:VEVENT UID:13275126001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120125T173000Z DTEND:20120125T183000Z SUMMARY:Princeton University Wunch Talk, "Adding Sparks to Pulsar Magnetospheres" (Jason Li, Princeton University Graduate Student) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1327944600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120130T173000Z DTEND:20120130T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1327944600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120130T173000Z DTEND:20120130T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132794910013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120130T184500Z DTEND:20120130T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Detection of Pristine Gas Two Billion Years After the Big Bang" (Michele Fumagalli, University of California, Santa Cruz) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:1327950000c30f403ffd4e93366bda8fa64760d5d6@sns.ias.edu DTSTART:20120130T190000Z DTEND:20120130T200000Z SUMMARY:Princeton University Astroplasmas Seminar - NOTE TIME, "Pulsar-wind Termination Shocks" (John Kirk, Max-Planck-Institut fur Kernphysik, Heidelberg) DESCRIPTION: LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132802560081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120131T160000Z DTEND:20120131T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Empirical Case For 10 GeV Dark Matter" (Dan Hooper, Fermi National Accelerator Laboratory) DESCRIPTION:ABSTRACT: I will summarize and discuss the body of evidence which has accumulated in favor of dark matter in the form of approximately 10 GeV particles. This evidence includes the spectrum and angular distribution of gamma rays from the Galactic Center, the synchrotron emission from the Milky Way's radio filaments, the diffuse synchrotron emission from the Inner Galaxy (the "WMAP Haze") and low-energy signals from the direct detection experiments DAMA/LIBRA, CoGeNT and CRESST-II. This collection of observations can be explained by a relatively light dark matter particle with an annihilation cross section consistent with that predicted for a simple thermal relic (sigma v ~ 10^-26 cm^3/s) and with a distribution in the halo of the Milky Way consistent with that predicted from simulations. Astrophysical explanations for the gamma ray and synchrotron signals, in contrast, have not been successful in accommodating these observations. Similarly, the phase of the annual modulation observed by DAMA/LIBRA (and now supported by CoGeNT) is inconsistent with all known or postulated modulating backgrounds, but are in good agreement with expectations for dark matter scattering. This scenario is consistent with all existing indirect and collider constraints, as well as the constraints placed by CDMS. Consistency with xenon-based experiments can be achieved if the response of liquid xenon to very low-energy nuclear recoils is somewhat suppressed relative to previous evaluations, or if the dark matter possesses different couplings to protons and neutrons. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1328031000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120131T173000Z DTEND:20120131T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13281174001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120201T173000Z DTEND:20120201T183000Z SUMMARY:Princeton University Wunch Talk, "The Incidence of AGN is Independent of Host Stellar Mass" (James Aird, University of California, San Diego) DESCRIPTION:ABSTRACT: I will present evidence that the incidence of Active Galactic Nuclei (AGN), when defined in terms of Eddington ratio, is independent of the stellar mass of the host galaxy. We use X-ray data from three extragalactic fields (XMM-LSS, COSMOS and ELAIS-S1) to identify AGN within PRIMUS, a low-resolution spectroscopic survey of >120,000 galaxies to z=1.2. We find that the Eddington ratio distribution for moderate-luminosity AGN is a universal function, exhibiting a power-law distribution with a slope of -0.6, over a wide range of galaxy stellar masses. We also find that the AGN fraction strongly increases with redshift to z~1, and is weakly enhanced (factor ~2) in galaxies with blue or green optical colors. AGN activity and star-formation are correlated, but we do not find evidence that the presence of an AGN (and therefore AGN feedback) is related to the quenching of star-formation or the color transformation of galaxies. Indeed, our results show that AGN are found in galaxies of all stellar masses and colors, and are not predominantly in red, passively-evolving, massive galaxies - while a higher fraction of AGN may be observed in such galaxies, this is purely a selection effect related to the underlying Eddington-ratio distribution. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:132812460014d489eed6f43f495c4213d09e7236fe@sns.ias.edu DTSTART:20120201T193000Z DTEND:20120201T203000Z SUMMARY:Institute for Advanced Study Astrophysics Blackboard Talk, "High-Contrast Imaging of Planets Around Other Stars" (Bob Vanderbei, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT:Dave Spiegel is the organizer. URL: END:VEVENT BEGIN:VEVENT UID:1328198400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120202T160000Z DTEND:20120202T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Galaxy Clusters: Beyond Spherical Cows" (Joanne Cohn, University of California, Berkeley) DESCRIPTION:ABSTRACT: The simple paradigm of a galaxy cluster as isolated, smooth and spherical leads to many useful results, both about clusters themselves and when using clusters for cosmological parameters and galaxy evolution. A high resolution large volume dark matter simulation will be used to characterize some of the departures (the cosmic web, galaxy substructure) from these cluster idealities, their relations to each other, and some of the consequences for cluster galaxies, observed cluster masses, and beyond. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1328549400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120206T173000Z DTEND:20120206T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1328549400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120206T173000Z DTEND:20120206T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132855390013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120206T184500Z DTEND:20120206T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "The Milky Way Thick Disk" (Jo Bovy, Discussion Leader, Institute for Advanced Study) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The first paper to be discussed is: "The spatial structure of mono-abundance sub-populations of the Milky Way disk," by Jo Bovy, et al. The link to this paper is: http://arxiv.org/abs/1111.1724 . The second paper to be discussed is: "Dynamical Evidence for Environmental Evolution of Intermediate-Redshift Spiral Galaxies," by Moran, et al. The link to the paper is: http://adsabs.harvard.edu/abs/2007ApJ...659.1138M . The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1111.1724 END:VEVENT BEGIN:VEVENT UID:132863040081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120207T160000Z DTEND:20120207T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Redshift Space Distortions and the Growth of Cosmic Structure" (Martin White, University of California, Berkeley) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1328635800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120207T173000Z DTEND:20120207T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1328650200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120207T213000Z DTEND:20120207T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Dark Matter in the Smallest Galaxies" (Matt Walker, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:ABSTRACT: At present the Milky Way's dwarf spheroidal (dSph) satellites are the smallest objects associated empirically with the phenomenology of dark matter. They also exhibit the largest dynamical mass-to-light ratios, with some estimates reaching several thousand times the solar value in optical wavelengths. Insofar as their baryons are dynamically negligible, dSphs provide a relatively clear window onto the properties of dark matter within galaxies. I will present empirical constraints, derived from stellar kinematics, on the amount and spatial distribution of dark matter within individual dSphs and will briefly discuss potential implications for cosmology and particle physics. LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13287222001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120208T173000Z DTEND:20120208T183000Z SUMMARY:Princeton University Wunch Talk, "''Retired'' Planet Hosts: Not So Massive, Maybe Just Portly After Lunch" (James Lloyd, Cornell University) DESCRIPTION:ABSTRACT: Studies of the planet abundance as a function of stellar mass have shown a strong increase in the frequency of planet occurrence around stars more massive than 1.5 Msun, and that such stars are deficit in short period planets. These planet searches have relied on giant stars for a sample of high mass stars, which are hostile to precision Doppler measurements while on the main sequence due to rotation and activity. However, the observationally inferred mass for exoplanet hosting giants is inconsistent with the expected masses of a sample of field giants. These stars are more likely to have originated from a main sequence population of late F/early G dwarfs with mass 1.0-1.2 Msun, only slightly more more massive than the typical FGK dwarfs with Doppler detected planets. The erroneous mass determinations most likely arise from the extrapolation of solar-calibrated mixing length theory to the red giant branch, and suggests that the isochrones need revision with a slightly larger mixing length on the red giant branch. The deficit of short period planets is most likely explained by tidal capture. The planet abundance increase requires either a high rate of false positives in giant stars due to signals of stellar origin or a new mechanism to migrate planets inwards during the post main sequence evolution of the host star. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1328803200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120209T160000Z DTEND:20120209T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Planetary Population Synthesis: Comparing Planet Formation Theory and Observation" (Christoph Mordasini, Max-Planck-Institute for Astronomy, Heidelberg) DESCRIPTION:ABSTRACT: The last few years have seen a tremendous increase of observational data regarding the properties of extrasolar planets. High precision radial velocity and transit observations have yielded large datasets which are important to improve our understanding of planet formation and evolution. But also other techniques like microlensing or direct imaging start to contribute information regarding other basic properties of the extrasolar planets. Bringing all these different dataset into one coherent picture to improve our theoretical understanding is challenging, as each technique is constraining a different aspect of the formation and evolution process. I will present planetary population synthesis as a useful method in this context as it allows many direct comparisons of theoretical results with observational data. For the synthesis, we use a planetary formation model which is based on the core accretion paradigm, but includes also disk migration and disk evolution. By varying the initial conditions of the model according to observed distributions of properties of protoplanetary disk (e.g. disk mass or lifetime) we synthesize planetary populations. Recently, we have extended this formation model into a self-consistently coupled formation and evolution model. Thanks to this it is now possible to compare a synthetic and the actual observed planetary population in all major characteristics, namely in their mass, semimajor axis, radius and luminosity distributions. As an application, I will show comparisons with transit observations concerning the synthetic and the observed radius distribution, the semimajor axis distribution of planets close to the star, and the mass-radius relationship. We find that the latter can only be reproduced if strongly reduced grain opacities are assumed during the formation process, establishing an interesting link between microphysical processes like grain growth during formation and observable quantities nowadays. I will finally make predictions for the luminosity distribution of massive planets for future direct imaging searches. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13288086002daab2910234658d397bcf477d2115b5@sns.ias.edu DTSTART:20120209T173000Z DTEND:20120209T183000Z SUMMARY:Princeton University/Institute for Advanced Study Transient Discussion - ROOM ADDED (General Discussion) DESCRIPTION:A bi-weekly discussion will focus on the general topic of stellar transients/explosions (supernovae, GRBs, fast transients, etc. and connection to progenitors). The location will alternate between Princeton University and the Institute for Advance Study. Check the web site for the location. Please e-mail Jose Prieto to be added to the e-mail list. See the web site for papers to be discussed. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL:http://princetontransients.wikispaces.com/ END:VEVENT BEGIN:VEVENT UID:1328835600963fdc0ffccf2c204cfa8d05e24f56bc@sns.ias.edu DTSTART:20120210T010000Z DTEND:20120210T020000Z SUMMARY:Princeton University Department of Physics Donald Hamilton Lecture - SPECIAL TIME AND LOCATION, "Making a Splash, Breaking a Neck: The Development of Complexity in Physical Systems" (Leo Kadanoff, University of Chicago) DESCRIPTION:SHORT ABSTRACT: The fundamental laws of physics are very simple. The world about us is very complex. Living things are very complex indeed. LOCATION:McDonnell Hall, Room A02 - NOTE LOCATION COMMENT: URL:http://www.princeton.edu/physics/events/colloquia/ END:VEVENT BEGIN:VEVENT UID:13288932003bfa679004d733190654c82765a6229f@sns.ias.edu DTSTART:20120210T170000Z DTEND:20120210T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch - ADDED, "Topics in Gravity/cosmology" (Various Postdocs, Princeton University and Institute for Advanced Study) DESCRIPTION:To kick off the semester, we will have a series of short (<= 20 min) talks from local postdocs from the Physics and Astronomy departments, the PCTS, and the IAS working on gravity/cosmology-related topics. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:Hoagie order cut off new time: 9:30 am. URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1328895000f419de7d4071453d0b2de0634eca45ee@sns.ias.edu DTSTART:20120210T173000Z DTEND:20120210T183000Z SUMMARY:Princeton University Astroplasmas Seminar, "Physics from X-ray Observations of Galaxy Clusters" (Maxim Markevitch, NASA Goddard Space Flight Center) DESCRIPTION:ABSTRACT: Mergers of galaxy clusters -- some of the most energetic events in theUniverse -- produce disturbances in hot intracluster medium, such asshocks and cold fronts, that can be used as tools to study the physics of galaxy clusters. X-ray observations of shock fronts provide information on the shock Mach number and velocity, and for well-observed shocks, constrain the microphysical properties of the intracluster plasma. Cold fronts may constrain viscosity and the structure and strength of the cluster magnetic fields. Combined with radio data, these observations also shed light on the production of ultrarelativistic particles that are known to coexist with the cluster thermal plasma. While cold fronts are commonly seen in merging and relaxed clusters, only a few unambiguous shock fronts have been seen in X-rays so far. This talk will summarize the current X-ray observations of cluster mergers, as well as some recent radio data and high-resolution hydrodynamic simulations. LOCATION:Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1329154200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120213T173000Z DTEND:20120213T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1329154200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120213T173000Z DTEND:20120213T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132915420049c71c6015aa36e2f2aaf1d0ab7c4473@sns.ias.edu DTSTART:20120213T173000Z DTEND:20120213T183000Z SUMMARY:Princeton Institute for Computational Science and Engineering (PICSciE) Colloquium, "The Astronomical Multipurpose Software Environment and the Ecology of Star Clusters" (Simon Portegies Zwart, Leiden University) DESCRIPTION:ABSTRACT: Star cluster ecology is the field of research where stellar evolution, gravitational dynamics, hydrodynamcs and the background potential dynamics of the parent galaxy interact to a complex non-linear evolution of self gravitating stellar systems. I will review the processes related to the ecology of stellar clusters, discuss the numerical hurdles and the physical principles. In addition, I will introduce the AMUSE framework with which we are performing simulations of the ecology of stellar clusters. AMUSE is a general purpose framework for interconnecting existing scientific software with a homogeneous and unified interface. The framework is based on the standard message passing interface any production ready code that is written in a language that supports its native bindings can be incorporated, in addition our framework is intrinsically parallel and it conveniently separates the all the numerical solvers in memory. LOCATION:Princeton University, Visualization Lab, 346 Lewis Science Library COMMENT:Light lunch served at 11:45 am in PICSciE Reception, 300 Lewis Science Library. URL:http://www.princeton.edu/researchcomputing/about/picscie/ END:VEVENT BEGIN:VEVENT UID:132915870013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120213T184500Z DTEND:20120213T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "The CANDELS Survey" (Claire Lackner, Discussion Leader, Princeton University) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . Links to the papers to be discussed are http://arxiv.org/abs/1110.3794 and http://arxiv.org/abs/1110.3786 . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://arxiv.org/abs/1110.3794 END:VEVENT BEGIN:VEVENT UID:132923520081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120214T160000Z DTEND:20120214T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Spiral Structure and Kinematics of the Milky Way" (Mark Reid, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:The Bar and Spiral Structure Legacy (BeSSeL) Survey is an NRAO KeyScience Project that has been awarded 5000 hours of VLBA observing timefrom 2010 to 2015. Results from the first year's observations will bepresented. A major goal is to determine the Milky Way's spiral structureby measuring trigonometric parallaxes and proper motions for hundreds ofhigh-mass star forming regions. Also, with full 3-dimensional spatialand velocity information, we will be able to construct an accuraterotation curve for the Milky Way and estimate the distance to theGalactic center and the circular rotation speed at the Sun to about 1%accuracy. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1329240600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120214T173000Z DTEND:20120214T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1329255000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120214T213000Z DTEND:20120214T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Planet Formation and Dynamics at Wide Separations" (Ruth Murray-Clay, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION:ABSTRACT: Several giant planets have now been directly imaged, offering the first view of extrasolar planets at wide separations from their host stars. Formation of these objects, either by core accretion or gravitational instability, presents substantial theoretical difficulties. In this talk, I will discuss the challenges and opportunities posed by wide-separation planets for theories of planet formation and orbital evolution. I will emphasize (1) a new theory of planetary core growth in the presence of gas that extends the reach of core accretion to large stellocentric distances and (2) new constraints on the dynamical history of the outer solar system. LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13293270001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120215T173000Z DTEND:20120215T183000Z SUMMARY:Princeton University Wunch Talk, "AGN Obscuration Through Dusty Infrared Dominated Flows" (Anton Dorodnitsyn, University of Maryland) DESCRIPTION:ABSTRACT: We explore a detailed model in which the active galactic nucleus (AGN) obscuration results from the extinction of AGN radiation in a global flow driven by the pressure of infrared radiation on dust grains. We assume that external illumination by UV and soft X-rays of the dusty gas located at approximately 1pc away from the supermassive black hole is followed by a conversion of such radiation into IR. Using 2.5D, time-dependent radiation hydrodynamics simulations in a flux-limited diffusion approximation we find that the external illumination can support a geometrically thick obscuration via outflows driven by infrared radiation pressure in AGN with luminosities greater than 0.05 Ledd and Compton optical depth, > 1. LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:132933420014d489eed6f43f495c4213d09e7236fe@sns.ias.edu DTSTART:20120215T193000Z DTEND:20120215T203000Z SUMMARY:Institute for Advanced Study Astrophysics Blackboard Talk, "Nothing, and the Quantum Creation of the Universe from Nothing" (Adam Brown, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT:Dave Spiegel is the organizer. URL: END:VEVENT BEGIN:VEVENT UID:1329408000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120216T160000Z DTEND:20120216T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Astronomical Multipurpose Software Environment and the Ecology of Star Clusters" (Simon Portegies Zwart, Leiden University) DESCRIPTION:ABSTRACT: Star cluster ecology is the field of research where stellar evolution, gravitational dynamics, hydrodynamcs and the background potential dynamics of the parent galaxy interact to a complex non-linear evolution of self gravitating stellar systems. I will review the processes related to the ecology of stellar clusters, discuss the numerical hurdles and the physical principles. In addition, I will introduce the AMUSE framework with which we are performing simulations of the ecology of stellar clusters. AMUSE is a general purpose framework for interconnecting existing scientific software with a homogeneous and unified interface. Since the framework is based on the standard message passing interface any production ready code that is written in a language that supports its native bindings can be incorporated, in addition our framework is intrinsically parallel and it conveniently separates the all the numerical solvers in memory. The strict separation also enables the possibility to realize unit conversion between the different modules and to recover from fatalities in a unified and structured way. The time spend in the framework is relatively small, and for production simulations we measured an overhead of at most 10\%, which in our case is acceptable. Due to the unified structure of the interface incorporating new modules which address the same physics is relatively straightforward. The time stepping between the codes can be simply consecutive or realized via a mixed variable symplectic method in which the Hamiltonian of the problem is solved in separate steps and combined via a Verlet-leapfrog integration scheme. In our experience with an implementation for multiphysics simulations in astrophysics we encounter relatively few problems with the strict separation in methods, and the results of our test simulations are consistent with earlier results that use a monolithic framework. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1329413400264b7f5f2d8accff8c0d10435fac77b3@sns.ias.edu DTSTART:20120216T173000Z DTEND:20120216T183000Z SUMMARY:Princeton University Princeton Center for Theoretical Science Visiting Lecturer Lunch Lecture, "Excellence in Computer Simulations" (Leo P. Kadanoff, University of Chicago) DESCRIPTION:Bring your own lunch! The Princeton Center for Theoretical Science, supported in part by D.E. Shaw & Co., has an annual visiting lectureship series that each year brings an outstanding theoretical scientist to campus. This year's PCTS Visiting Lecturer will be Professor Leo P. Kadanoff (John D. & Catherine T. MacArthur Distinguished Service Professor of Physics &Mathematics, Emeritus, University of Chicago), who will be giving the Hamilton Lecture in Physics (Thursday, February 9, 8:00 PM, McDonnell A02). In addition, he will give a series of seminars and informal lunch talks, all to be given in the PCTS Seminar Room, 407 Jadwin Hall. LOCATION:Jadwin Hall, Seminar Room 407, 4th floor COMMENT: URL:http://pctp.princeton.edu/pcts/FINALPosterKadanoff.pdf END:VEVENT BEGIN:VEVENT UID:132941880010cef9ff9d0cf1073441307f43795e7f@sns.ias.edu DTSTART:20120216T190000Z DTEND:20120216T200000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar Demonstration, "AMUSE Demonstration" (Simon Portegies Zwart and Arjen van Elteren, Leiden University) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT:Simon Portegies Zwart will be giving the IAS Informal Seminar at 11 am the same day. URL:http://amusecode.org/ END:VEVENT BEGIN:VEVENT UID:1329418800b6225c6d55151bb52167d7e1cb0535a0@sns.ias.edu DTSTART:20120216T190000Z DTEND:20120216T200000Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia - NOTE DAY AND TIME, "Fast Magnetic Reconnection: Bridging Laboratory and Space Plasma Physics" (Amitava Bhattacharjee, University of New Hampshire - Durham) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 1:45 pm. ABSTRACT: Recent developments in experimental and theoretical studies of magnetic reconnection hold promise for providing solutions to outstanding problems in laboratory and space plasma physics. Examples include sawtooth crashes in tokamaks, substorms in the Earths Magnetosphere, eruptive solar flares, and more recently, fast reconnection in laser-produced high energy density plasmas. In each of these examples, a common and long-standing challenge has been to explain why fast reconnection proceeds rapidly from a relatively quiescent state. In this talk, we demonstrate the advantages of viewing these problems and their solutions from a common perspective. We focus on some recent, surprising discoveries regarding the role of secondary plasmoid instabilities of thin current sheets. Nonlinearly, these instabilities lead to fast reconnection rates that are very weakly dependent on the Lundquist number of the plasma. LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT:Refreshments are at 1:45 pm. URL:http://www.pppl.gov/colloquia.cfm END:VEVENT BEGIN:VEVENT UID:13294278008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120216T213000Z DTEND:20120216T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Towards the Principles of Self Assembly" (Michael Brenner, Harvard University) DESCRIPTION:ABSTRACT: In biological systems, there are striking examples where complicated structures (i.e., the bacterial ribosome) can spontaneously assemble, driven by specific interactions between the components. But how can systems be designed to have this property? Recent technological advances have created the opportunity for making technologically relevant systems that self assemble, by e.g. coating colloidal particles with DNA. We will discuss how self assembly works in this system, through theory, numerical simulation and experiment -- and start to speculate as to whether resulting principles might be useful for unravelling the rules of biological self-assembly. LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:132949800022f112629c84f597b1c327d1bd26c346@sns.ias.edu DTSTART:20120217T170000Z DTEND:20120217T180000Z SUMMARY:Princeton University Gravity Group Astrophysics/Cosmology Lunch, "Topics in Gravity/cosmology - Part 2" (Various Postdocs, Princeton University and Institute for Advanced Study) DESCRIPTION:To kick off the semester, we will have a series of short (<= 20 min) talks from local postdocs from the Physics and Astronomy departments, the PCTS, and the IAS working on gravity/cosmology-related topics. February 17 will be a continuation of the February 10th meeting. LOCATION:Jadwin Hall, Room 102 (Joe Henry Room) COMMENT:Hoagie order cut off new time: 9:30 am. URL:http://www.physics.princeton.edu/cosmology/journalclub/ END:VEVENT BEGIN:VEVENT UID:1329759000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120220T173000Z DTEND:20120220T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1329759000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120220T173000Z DTEND:20120220T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:132976350013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120220T184500Z DTEND:20120220T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:132984000081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120221T160000Z DTEND:20120221T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "OGLE-IV - The Fourth Phase of the OGLE Survey" (Andzrej Udalski, Warsaw University Astronomical Observatory) DESCRIPTION:ABSTRACT: OGLE-IV, in operation since March 2010, is one of the largest sky surveys worldwide, regularly monitoring about one billion objects and collecting over 30 TB of raw data per year with the new generation 32-chip CCD mosaic camera. During the talk current status of the OGLE-IV project, latest results on microlensing exoplanet search, solar system object and variable sky studies as well as future plans will be presented. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1329845400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120221T173000Z DTEND:20120221T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1329859800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120221T213000Z DTEND:20120221T223000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Charles Gammie, University of Illinois at Urbana-Champaign) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13299318001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120222T173000Z DTEND:20120222T183000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Jeremiah Murphy, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1330012800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120223T160000Z DTEND:20120223T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "TBA" (Enrico Pajer, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13300326008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120223T213000Z DTEND:20120223T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Richard Prum, Yale University) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1330363800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120227T173000Z DTEND:20120227T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1330363800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120227T173000Z DTEND:20120227T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133036830013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120227T184500Z DTEND:20120227T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group], "Detection of Pristine Gas Two Billion Years After the Big Bang" (Michele Fumagalli, University of California, Santa Cruz) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:133044480081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120228T160000Z DTEND:20120228T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Alicia Soderberg, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1330450200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120228T173000Z DTEND:20120228T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1330464600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120228T213000Z DTEND:20120228T223000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Nima Arkani-Hamed, Institute for Advanced Study) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13305366001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120229T173000Z DTEND:20120229T183000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Mansi Kasliwal, Carnegie Observatories) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1330617600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120301T160000Z DTEND:20120301T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Climate and Atmospheric Circulation of Earth-like Exoplanets" (Tim Merlis, Princeton University) DESCRIPTION:ABSTRACT: I present the results of atmospheric general circulation modelling experiments for Earth-like planets in tidally locked configurations. The factors controlling the atmospheric circulation, which transports heat from the day side to the night side, are analyzed in light of basic scaling arguments and the mechanistic understanding that has been developed in the study of Earth's atmosphere. Inspired by habitability implications, I examine the simulated surface climate for a range of rotation periods and solar constants. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13306374008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120301T213000Z DTEND:20120301T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "Measuring the Spins of Black Holes and Applying the Results" (Jeffrey McClintock, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1330968600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120305T173000Z DTEND:20120305T183000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1330968600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120305T173000Z DTEND:20120305T183000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133097310013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120305T184500Z DTEND:20120305T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:133104960081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120306T160000Z DTEND:20120306T170000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Elliot Quataert, University of California, Berkeley) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1331055000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120306T173000Z DTEND:20120306T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1331069400c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120306T213000Z DTEND:20120306T223000Z SUMMARY:Princeton University Astronomy Colloquium, "Gravitational Waves and Supernova Explosions from Merging White Dwarfs" (Mukremin Kilic, University of Oklahoma) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13311414001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120307T173000Z DTEND:20120307T183000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Michael Berry, Rutgers, The State University of New Jersey) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1331222400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120308T160000Z DTEND:20120308T170000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Tractor: Using Forward Modeling to Measure objects in Atronomical Images" (Dustin Lang, Princeton University) DESCRIPTION:ABSTRACT: I will present some early results from 'the Tractor', a new approach for measuring astronomical sources in collections of images that David Hogg (NYU) and I have been developing. The idea to use generative (forward) modeling: we want to produce an astronomical source catalog that, along with image calibration information, allows us to predict the image pixels that were actually observed. If we have multiple images (in multiple bands, or from multiple instruments, say), we can optimize the source catalog to jointly best explain the observed images. Unlike traditional methods, we never have to co-add, degrade or reject any of the images, and by sampling we can capture the covariance in our measurements. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13312422008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120308T213000Z DTEND:20120308T223000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1331569800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120312T163000Z DTEND:20120312T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1331569800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120312T163000Z DTEND:20120312T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133157430013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120312T174500Z DTEND:20120312T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:133165080081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120313T150000Z DTEND:20120313T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Masataka Fukugita, Institute for the Physics and Mathematics of the Universe (IPMU)) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1331656200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120313T163000Z DTEND:20120313T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1331670600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120313T203000Z DTEND:20120313T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Andrei Beloborodov, Columbia University) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13317426001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120314T163000Z DTEND:20120314T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Mikhail Belyaev, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1331823600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120315T150000Z DTEND:20120315T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Asymmetric Higgsino Dark Matter" (Kfir Blum, Institute for Advanced Study) DESCRIPTION:ABSTRACT: In the supersymmetric framework, a higgsino asymmetry exists in the universe before the electroweak phase transition. We investigate whether the higgsino is a viable asymmetric dark matter candidate. We find that this is indeed possible. The gauginos, squarks and sleptons must all be very heavy, such that the only electroweak-scale superpartners are the higgsinos. The temperature of the electroweak phase transition must be in the (1 − 10) GeV range. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13318434008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120315T203000Z DTEND:20120315T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "Irreversibility and the Second Law of Thermodynamics at the Nanoscale" (Christopher Jarzynski, University of Maryland) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1332174600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120319T163000Z DTEND:20120319T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion, http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1332174600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120319T163000Z DTEND:20120319T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133217910013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120319T174500Z DTEND:20120319T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:133225560081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120320T150000Z DTEND:20120320T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "Hypervelocity Stars" (Warren Brown, Smithsonian Astrophysical Observatory) DESCRIPTION:ABSTRACT: A massive black hole sits in the heart of the Milky Way. One consequence of the black hole is that it ejects "hypervelocity stars" from the Milky Way at ~1000 km/s velocities. We discovered the first hypervelocity star in 2005, and since then our targeted survey has discovered 20 unbound stars and a comparable number of possibly bound hypervelocity stars. Recent results include a surprising anisotropic spatial distribution of hypervelocity stars, unbound disk runaways, and HST proper motion measurements that may allow us constrain the shape and orientation of the Galactic potential. LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1332261000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120320T163000Z DTEND:20120320T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1332275400c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120320T203000Z DTEND:20120320T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Challenges for Understanding the Evolution of Massive Stars: Rotation, Binarity, and Mergers" (Selma de Mink, Space Telescope Science Institute) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13323474001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120321T163000Z DTEND:20120321T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Timothy Brandt, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1332428400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120322T150000Z DTEND:20120322T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "The Electro-Weak Scale: Key to the Origin of Visible and Dark Matter?" (Stefano Profumo, University of California, Santa Cruz) DESCRIPTION:ABSTRACT: New physics at the electro-weak scale might unlock the mysteries of the generation of the (baryonic) matter-antimatter asymmetry and of the particle nature of dark matter. I will review recent progress on understanding baryogenesis at the electro-weak phase transition, and the multitude of experimental tests that this scenario offers, including collider, gravity waves and electric dipole moment searches. I will argue that this scenario is firmly falsifiable, with a time-line of only a few years. I will then discuss searches for weak-scale particle dark matter in astrophysical data, including an updated review of controversial signals in cosmic-ray and gamma-ray data. I will address the question of whether it is feasible to learn about New Physics "from the Sky", and outline theoretical and observational strategies for a roadmap towards the discovery of the nature of dark matter. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1332779400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120326T163000Z DTEND:20120326T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1332779400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120326T163000Z DTEND:20120326T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133278390013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20120326T174500Z DTEND:20120326T184500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:133286040081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120327T150000Z DTEND:20120327T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Adam Showman, University of Arizona) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1332865800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120327T163000Z DTEND:20120327T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1332880200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120327T203000Z DTEND:20120327T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1332880200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120327T203000Z DTEND:20120327T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Bill Matthaeus, University of Delaware) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13329522001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120328T163000Z DTEND:20120328T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Alexander Tchekhovskoy, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1333033200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120329T150000Z DTEND:20120329T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar (Raphael Flauger, Institute for Advanced Study) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13330530008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120329T203000Z DTEND:20120329T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Ana Maria Rey, JILA) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1333384200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120402T163000Z DTEND:20120402T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1333384200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120402T163000Z DTEND:20120402T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133346520081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120403T150000Z DTEND:20120403T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Eiichiro Komatsu, University of Texas at Austin) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1333470600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120403T163000Z DTEND:20120403T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1333485000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120403T203000Z DTEND:20120403T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Neutron Star Radii and Masses" (Feryal Ozel, University of Arizona) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13335570001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120404T163000Z DTEND:20120404T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Blake Sherwin, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1333638000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120405T150000Z DTEND:20120405T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Dynamical Tides in Kepler KOI-54 System and in Compact White Dwarf Binaries" (Dong Lai, Cornell University) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13336578008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120405T203000Z DTEND:20120405T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1333989000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120409T163000Z DTEND:20120409T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1333989000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120409T163000Z DTEND:20120409T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133407000081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120410T150000Z DTEND:20120410T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Roger Chevalier, University of Virginia) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1334075400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120410T163000Z DTEND:20120410T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1334089800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120410T203000Z DTEND:20120410T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Gas and Star Formation in Nearby Galaxies: New Results from the Herschel Space Observatory" (Christine Wilson, McMaster University) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13341618001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120411T163000Z DTEND:20120411T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Jose Prieto, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1334242800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120412T150000Z DTEND:20120412T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar, "Large-scale Structure with the Lyman-Alpha Forest from BOSS" (Jordi Miralda Escude, University of Barcelona) DESCRIPTION:ABSTRACT: The first results obtained from the Baryon acoustic Oscillation Spectroscopic Survey in SDSS-III on large-scale structure using the Lyman alpha forest will be discussed. Thanks to the unprecedentedly large numbers of quasar spectra being obtained by BOSS, absorption spectra are emerging as a powerful tool for the study of the large-scale distribution and cross-correlations of hydrogen, galaxies, QSOs, and metal absorbers in the universe. This promises to provide new clues for fundamental cosmology, the nature of quasars, the relation of galaxies to their environment, and the first metals that were released to the intergalactic medium. LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1334593800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120416T163000Z DTEND:20120416T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1334593800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120416T163000Z DTEND:20120416T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133467480081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120417T150000Z DTEND:20120417T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Persistence of Methane Through Time on Saturn's Moon Titan" (Jonathan Lunine, Cornell University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1334680200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120417T163000Z DTEND:20120417T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1334694600c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120417T203000Z DTEND:20120417T213000Z SUMMARY:Princeton University Astronomy Colloquium, "The Dark Universe as Viewed by CFHTLenS" (Catherine Heymans, University of Edinburgh) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13347666001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120418T163000Z DTEND:20120418T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Dimitrios Giannios, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:133478010039a59f2ea4b62345e243fd7e6786d0d9@sns.ias.edu DTSTART:20120418T201500Z DTEND:20120418T211500Z SUMMARY:Princeton Plasma Physics Laboratory (PPPL) Collioquia, "The Interior of Planets" (Sabine Stanley, University of Toronto) DESCRIPTION:Any non-PPPL people interested in attending should see this site for more information: http://www.pppl.gov/visiting.cfm . Refreshments are at 4:00 pm, seminar is at 4:15 pm. LOCATION:Princeton Plasma Physics Laboratory, Melvin B. Gottlieb Auditorium COMMENT: URL:http://www.pppl.gov/colloquia.cfm END:VEVENT BEGIN:VEVENT UID:1334847600684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120419T150000Z DTEND:20120419T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar (TBA) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13348674008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120419T203000Z DTEND:20120419T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Erik Verlinde, Institute for Theoretical Physics, University of Amsterdam) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1335198600961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120423T163000Z DTEND:20120423T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1335198600787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120423T163000Z DTEND:20120423T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133527960081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120424T150000Z DTEND:20120424T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Dimitar Sasselov, Harvard-Smithsonian Center for Astrophysics) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1335285000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120424T163000Z DTEND:20120424T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1335299400c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120424T203000Z DTEND:20120424T213000Z SUMMARY:Princeton University Astronomy Colloquium, "Early Star Forming Galaxies and Reionization" (Dan Stark) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13353714001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120425T163000Z DTEND:20120425T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Yan-Fei Jiang, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1335452400684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120426T150000Z DTEND:20120426T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar (TBA) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13354722008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120426T203000Z DTEND:20120426T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Steve Koonin, Institute for Defense Analysis) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:133578720050a9e6f92edeb740b1340358bb504d01@sns.ias.edu DTSTART:20120430T120000Z DTEND:20120430T210000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) Electromagnetic and Gravitational Workshop - Day 1, "Connecting the Electromagnetic and Gravitational Wave Skies in the Era of Advanced LIGO" (Various - See Website) DESCRIPTION:Workshop dates: April 30 - May 4. It is anticipated that within the next few years the first direct detection of gravitational waves will be made with advanced networks of ground based interferometers including LIGO and Virgo. Because some gravitational wave events may be accompanied by transient electromagnetic counterparts, coordination between electromagnetic and gravitational wave observers will be critical to maximize the scientific return from these discoveries. In addition, theoretical models and data analysis strategies must already be in place before the gravitational wave observatories observe first "light".With this in mind, we will be hosting this week-long workshop at the Princeton Center for Theoretical Science (PCTS) on April 30-May 4, 2012. The goal of the workshop will be to bring together a small group of researchers, including key members of the detector experiments, observational and theoretical astronomers, and numerical relativists, for an informal discussion of how to maximize the science from "multi-messenger" gravitational wave astronomy. The planned format is to intersperse a relatively sparse schedule of talks with panel-lead open discussions of the challenges facing different aspects of the endeavor (data analysis, source modeling, transient surveys, detector enhancements, etc) to further stimulate discussion. Program Organizers are Adam Burrows, Sean McWilliams, Brian Metzger, Frans Pretorius, David Spergel, Anatoly Spitkovsky, and Paul Steinhardt. LOCATION:Jadwin Hall COMMENT:Check website for exact times. URL:http://pcts.princeton.edu/pcts/grav_waves2012/grav_waves2012.html END:VEVENT BEGIN:VEVENT UID:1335803400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120430T163000Z DTEND:20120430T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1335803400787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120430T163000Z DTEND:20120430T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133587360007b1175dfb5c090b4db434f87c801e9f@sns.ias.edu DTSTART:20120501T120000Z DTEND:20120501T210000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) Electromagnetic and Gravitational Workshop - Day 2, "Connecting the Electromagnetic and Gravitational Wave Skies in the Era of Advanced LIGO" (Various - See Website) DESCRIPTION:Workshop dates: April 30 - May 4. It is anticipated that within the next few years the first direct detection of gravitational waves will be made with advanced networks of ground based interferometers including LIGO and Virgo. Because some gravitational wave events may be accompanied by transient electromagnetic counterparts, coordination between electromagnetic and gravitational wave observers will be critical to maximize the scientific return from these discoveries. In addition, theoretical models and data analysis strategies must already be in place before the gravitational wave observatories observe first "light".With this in mind, we will be hosting this week-long workshop at the Princeton Center for Theoretical Science (PCTS) on April 30-May 4, 2012. The goal of the workshop will be to bring together a small group of researchers, including key members of the detector experiments, observational and theoretical astronomers, and numerical relativists, for an informal discussion of how to maximize the science from "multi-messenger" gravitational wave astronomy. The planned format is to intersperse a relatively sparse schedule of talks with panel-lead open discussions of the challenges facing different aspects of the endeavor (data analysis, source modeling, transient surveys, detector enhancements, etc) to further stimulate discussion. Program Organizers are Adam Burrows, Sean McWilliams, Brian Metzger, Frans Pretorius, David Spergel, Anatoly Spitkovsky, and Paul Steinhardt. LOCATION:Jadwin Hall COMMENT:Check website for exact times. URL:http://pcts.princeton.edu/pcts/grav_waves2012/grav_waves2012.html END:VEVENT BEGIN:VEVENT UID:133588440081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120501T150000Z DTEND:20120501T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "The Connection between Lyman Alpha Emitters and Typical Present-day Galaxies" (Eric Gawiser, Rutgers, The State University of New Jersey) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1335889800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120501T163000Z DTEND:20120501T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1335904200c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120501T203000Z DTEND:20120501T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Shri Kulkarni) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13359600001e0fac358dccda6eaf45dd75a30cccfd@sns.ias.edu DTSTART:20120502T120000Z DTEND:20120502T210000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) Electromagnetic and Gravitational Workshop - Day 3, "Connecting the Electromagnetic and Gravitational Wave Skies in the Era of Advanced LIGO" (Various - See Website) DESCRIPTION:Workshop dates: April 30 - May 4. It is anticipated that within the next few years the first direct detection of gravitational waves will be made with advanced networks of ground based interferometers including LIGO and Virgo. Because some gravitational wave events may be accompanied by transient electromagnetic counterparts, coordination between electromagnetic and gravitational wave observers will be critical to maximize the scientific return from these discoveries. In addition, theoretical models and data analysis strategies must already be in place before the gravitational wave observatories observe first "light".With this in mind, we will be hosting this week-long workshop at the Princeton Center for Theoretical Science (PCTS) on April 30-May 4, 2012. The goal of the workshop will be to bring together a small group of researchers, including key members of the detector experiments, observational and theoretical astronomers, and numerical relativists, for an informal discussion of how to maximize the science from "multi-messenger" gravitational wave astronomy. The planned format is to intersperse a relatively sparse schedule of talks with panel-lead open discussions of the challenges facing different aspects of the endeavor (data analysis, source modeling, transient surveys, detector enhancements, etc) to further stimulate discussion. Program Organizers are Adam Burrows, Sean McWilliams, Brian Metzger, Frans Pretorius, David Spergel, Anatoly Spitkovsky, and Paul Steinhardt. LOCATION:Jadwin Hall COMMENT:Check website for exact times. URL:http://pcts.princeton.edu/pcts/grav_waves2012/grav_waves2012.html END:VEVENT BEGIN:VEVENT UID:13359762001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120502T163000Z DTEND:20120502T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Rodrigo Fernandez, Institute for Advanced Study) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1336046400750d8b1bd781ce7b51e0acb673ebe57c@sns.ias.edu DTSTART:20120503T120000Z DTEND:20120503T210000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) Electromagnetic and Gravitational Workshop - Day 4, "Connecting the Electromagnetic and Gravitational Wave Skies in the Era of Advanced LIGO" (Various - See Website) DESCRIPTION:Workshop dates: April 30 - May 4. It is anticipated that within the next few years the first direct detection of gravitational waves will be made with advanced networks of ground based interferometers including LIGO and Virgo. Because some gravitational wave events may be accompanied by transient electromagnetic counterparts, coordination between electromagnetic and gravitational wave observers will be critical to maximize the scientific return from these discoveries. In addition, theoretical models and data analysis strategies must already be in place before the gravitational wave observatories observe first "light".With this in mind, we will be hosting this week-long workshop at the Princeton Center for Theoretical Science (PCTS) on April 30-May 4, 2012. The goal of the workshop will be to bring together a small group of researchers, including key members of the detector experiments, observational and theoretical astronomers, and numerical relativists, for an informal discussion of how to maximize the science from "multi-messenger" gravitational wave astronomy. The planned format is to intersperse a relatively sparse schedule of talks with panel-lead open discussions of the challenges facing different aspects of the endeavor (data analysis, source modeling, transient surveys, detector enhancements, etc) to further stimulate discussion. Program Organizers are Adam Burrows, Sean McWilliams, Brian Metzger, Frans Pretorius, David Spergel, Anatoly Spitkovsky, and Paul Steinhardt. LOCATION:Jadwin Hall COMMENT:Check website for exact times. URL:http://pcts.princeton.edu/pcts/grav_waves2012/grav_waves2012.html END:VEVENT BEGIN:VEVENT UID:1336057200684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120503T150000Z DTEND:20120503T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar (Helmut Hofer, Institute for Advanced Study, School of Mathematics) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:13360770008ba3c03dbb12c7e0eb20cc24d960e952@sns.ias.edu DTSTART:20120503T203000Z DTEND:20120503T213000Z SUMMARY:Princeton University Department of Physics Colloquium, "TBA" (Bernard Schutz, Max Planck Institut fur Gravitationsphysik) DESCRIPTION: LOCATION:Jadwin Hall, Room A10 COMMENT: URL:http://www.princeton.edu/physics/events_archive/calendar.xml END:VEVENT BEGIN:VEVENT UID:1336132800da1ca930375afea9d2f2d671b8e32597@sns.ias.edu DTSTART:20120504T120000Z DTEND:20120504T210000Z SUMMARY:Princeton University Princeton Center for Theoretical Science (PCTS) Electromagnetic and Gravitational Workshop - Day 5, "Connecting the Electromagnetic and Gravitational Wave Skies in the Era of Advanced LIGO" (Various - See Website) DESCRIPTION:Workshop dates: April 30 - May 4. It is anticipated that within the next few years the first direct detection of gravitational waves will be made with advanced networks of ground based interferometers including LIGO and Virgo. Because some gravitational wave events may be accompanied by transient electromagnetic counterparts, coordination between electromagnetic and gravitational wave observers will be critical to maximize the scientific return from these discoveries. In addition, theoretical models and data analysis strategies must already be in place before the gravitational wave observatories observe first "light".With this in mind, we will be hosting this week-long workshop at the Princeton Center for Theoretical Science (PCTS) on April 30-May 4, 2012. The goal of the workshop will be to bring together a small group of researchers, including key members of the detector experiments, observational and theoretical astronomers, and numerical relativists, for an informal discussion of how to maximize the science from "multi-messenger" gravitational wave astronomy. The planned format is to intersperse a relatively sparse schedule of talks with panel-lead open discussions of the challenges facing different aspects of the endeavor (data analysis, source modeling, transient surveys, detector enhancements, etc) to further stimulate discussion. Program Organizers are Adam Burrows, Sean McWilliams, Brian Metzger, Frans Pretorius, David Spergel, Anatoly Spitkovsky, and Paul Steinhardt. LOCATION:Jadwin Hall COMMENT:Check website for exact times. URL:http://pcts.princeton.edu/pcts/grav_waves2012/grav_waves2012.html END:VEVENT BEGIN:VEVENT UID:1336408200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120507T163000Z DTEND:20120507T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1336408200787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120507T163000Z DTEND:20120507T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133648920081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120508T150000Z DTEND:20120508T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Glennys Farrar, New York University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1336494600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120508T163000Z DTEND:20120508T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1336509000c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120508T203000Z DTEND:20120508T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (Stefan Funk, Stanford University) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13365810001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120509T163000Z DTEND:20120509T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Ena Choi, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1336662000684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120510T150000Z DTEND:20120510T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1337013000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120514T163000Z DTEND:20120514T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1337013000787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120514T163000Z DTEND:20120514T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133709400081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120515T150000Z DTEND:20120515T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Jim Stone, Princeton University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1337099400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120515T163000Z DTEND:20120515T173000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1337113800c62e47ef52c55c96a766b05fbf47c54e@sns.ias.edu DTSTART:20120515T203000Z DTEND:20120515T213000Z SUMMARY:Princeton University Astronomy Colloquium, "TBA" (John Johnson) DESCRIPTION: LOCATION:Peyton Hall Auditorium COMMENT: URL:http://www.princeton.edu/astro/news-events/spring-colloquia-2012/ END:VEVENT BEGIN:VEVENT UID:13371858001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120516T163000Z DTEND:20120516T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Geoffroy Lesur, Institute of Planetology and Astrophysics of Grenoble (IPAG)) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1337266800684bf21b95a3a206e1cab7a2be887a6d@sns.ias.edu DTSTART:20120517T150000Z DTEND:20120517T160000Z SUMMARY:Institute for Advanced Study Informal Astrophysics Seminar (Neal Dalal, University of Illinois at Urbana-Champaign) DESCRIPTION: LOCATION:Bloomberg Hall, Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/informal_seminars.shtml END:VEVENT BEGIN:VEVENT UID:1337617800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120521T163000Z DTEND:20120521T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1337617800787768801885f48ce090934598058157@sns.ias.edu DTSTART:20120521T163000Z DTEND:20120521T173000Z SUMMARY:Princeton University/Institute for Advanced Study Planet/Exoplanet Discussion Group, "Potluck Discussion of Exoplanet Papers" (Everyone Welcome) DESCRIPTION:The Monday Planet Lunch will be held weekly. Graduate students are particularly encouraged to attend. The format will be informal and inclusive, spanning at a minimum exoplanets, the solar system, and astrobiology. Moreover, we plan on discussing multiple topics each time we meet, and not to tether a lunch to one organized presentation each sitting. The purpose is to foster wide-ranging and cross-fertilizing interaction and to keep the local community up to date on developments across the spectrum of associated activities. Cullen Blake, Adam Burrows, and Dave Spiegel are the organizers. LOCATION:Princeton University, Peyton Hall, Room 140 COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:133769880081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120522T150000Z DTEND:20120522T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Andrew MacFadyen, New York University) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1337704200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120522T163000Z DTEND:20120522T173000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13377906001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120523T163000Z DTEND:20120523T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Elisa Chisari, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:133830360081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120529T150000Z DTEND:20120529T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (Dieter Breiteschwedt, Berlin Institute of Technology) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1338309000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120529T163000Z DTEND:20120529T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:13383954001cfafeddefd77462a2082c585603a3d7@sns.ias.edu DTSTART:20120530T163000Z DTEND:20120530T173000Z SUMMARY:Princeton University Wunch Talk, "TBA" (Lucianne Walkowicz, Princeton University) DESCRIPTION: LOCATION:Peyton Hall, Room 33 (basement) COMMENT: URL:http://www.astro.princeton.edu/~wunch/ END:VEVENT BEGIN:VEVENT UID:1338827400961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120604T163000Z DTEND:20120604T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:133890840081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120605T150000Z DTEND:20120605T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (TBA) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1338913800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120605T163000Z DTEND:20120605T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1339432200961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120611T163000Z DTEND:20120611T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:133951320081afdab725a3bb7659cf05ccf9611017@sns.ias.edu DTSTART:20120612T150000Z DTEND:20120612T160000Z SUMMARY:Institute for Advanced Study Astrophysics Seminar, "TBA" (TBA) DESCRIPTION: LOCATION:Bloomberg Hall Astrophysics Library COMMENT: URL:http://www.sns.ias.edu/~seminar/colloquia.shtml END:VEVENT BEGIN:VEVENT UID:1339518600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120612T163000Z DTEND:20120612T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1340037000961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120618T163000Z DTEND:20120618T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion | Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at Princeton University. Attendees can bring their lunch. LOCATION:Princeton University, Peyton Hall, Dome Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1340641800961a55e760cbdeac644edb893ce12bb0@sns.ias.edu DTSTART:20120625T163000Z DTEND:20120625T173000Z SUMMARY:Princeton University/Institute for Advanced Study Early Universe/Cosmology Lunch Discussion, "General Discussion" (General Discussion) DESCRIPTION:Organizers are David Spergel, Princeton University, and Matias Zaldarriaga, Institute for Advanced Study. The lunch will be held at either Princeton University or the Institute for Advance Study. Check the calendar for the meeting location. This week's meeting is at the Institute for Advanced Study. Attendees can bring their own lunch or stop at the IAS Dining Hall. The West Seminar room is in a building which is a short walk from the main dining area. LOCATION:Institute for Advanced Study, West Building, West Seminar Room COMMENT: URL:http://mondaycosmo.pbworks.com/w/page/30421440/FrontPage END:VEVENT BEGIN:VEVENT UID:1346776200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120904T163000Z DTEND:20120904T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1347381000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120911T163000Z DTEND:20120911T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1347985800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120918T163000Z DTEND:20120918T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1348590600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20120925T163000Z DTEND:20120925T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1349195400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121002T163000Z DTEND:20121002T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1349800200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121009T163000Z DTEND:20121009T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1350405000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121016T163000Z DTEND:20121016T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1351009800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121023T163000Z DTEND:20121023T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1351614600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121030T163000Z DTEND:20121030T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1352223000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121106T173000Z DTEND:20121106T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1352827800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121113T173000Z DTEND:20121113T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1353432600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121120T173000Z DTEND:20121120T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1354037400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121127T173000Z DTEND:20121127T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1354642200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121204T173000Z DTEND:20121204T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:135473310013363a3419817900d973add8dad58abc@sns.ias.edu DTSTART:20121205T184500Z DTEND:20111205T194500Z SUMMARY:Princeton University/Institute for Advanced Study Galread [Galactic/Extragalactic Reading Group] (TBA) DESCRIPTION:Claire Lackner and Jenny Greene are the organizers. The group's website Is: http://www.astro.princeton.edu/galread/ . LOCATION:Princeton University, Peyton Hall, Grand Central Room COMMENT: URL:http://www.astro.princeton.edu/galread/ END:VEVENT BEGIN:VEVENT UID:1355247000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121211T173000Z DTEND:20121211T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1355851800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20121218T173000Z DTEND:20121218T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1358271000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130115T173000Z DTEND:20130115T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1358875800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130122T173000Z DTEND:20130122T193000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1359480600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130129T173000Z DTEND:20130129T193000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1360085400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130205T173000Z DTEND:20130205T193000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1360690200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130212T173000Z DTEND:20130212T193000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1361295000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130219T173000Z DTEND:20130219T193000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT 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Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1367339400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130430T163000Z DTEND:20130430T183000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1367944200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130507T163000Z DTEND:20130507T183000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1368549000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130514T163000Z DTEND:20130514T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dining Hall, Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1369758600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20130528T163000Z DTEND:20130528T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth 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Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1384277400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20131112T173000Z DTEND:20131112T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1384882200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20131119T173000Z DTEND:20131119T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1385487000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20131126T173000Z DTEND:20131126T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1386091800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20131203T173000Z DTEND:20131203T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room 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DTSTART:20140225T173000Z DTEND:20140225T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1393954200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140304T173000Z DTEND:20140304T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1394555400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140311T163000Z DTEND:20140311T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1395160200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140318T163000Z DTEND:20140318T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1395765000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140325T163000Z DTEND:20140325T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1396369800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140401T163000Z DTEND:20140401T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1396974600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140408T163000Z DTEND:20140408T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1397579400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140415T163000Z DTEND:20140415T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1398184200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140422T163000Z DTEND:20140422T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room 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DTSTART:20140916T163000Z DTEND:20140916T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1411489800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140923T163000Z DTEND:20140923T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1412094600dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20140930T163000Z DTEND:20140930T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1412699400dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141007T163000Z DTEND:20141007T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1413304200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141014T163000Z DTEND:20141014T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1413909000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141021T163000Z DTEND:20141021T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1414513800dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141028T163000Z DTEND:20141028T180000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1415122200dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141104T173000Z DTEND:20141104T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room COMMENT: URL: END:VEVENT BEGIN:VEVENT UID:1415727000dfddbecced582074d15268a8a795083f@sns.ias.edu DTSTART:20141111T173000Z DTEND:20141111T190000Z SUMMARY:Institute for Advanced Study Bahcall Lunch DESCRIPTION: LOCATION:Dilworth Room 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