What causes a quasar?

What causes a quasar?
Author(s):John N. Bahcall
Journal: Space Telescope Science Institute Newsletter, 12, 1-3 (May 1995).

postscript file     pdf file

This article describes the motivation for imaging nearby luminous quasars in order to discover what ``turns on'' a quasar and produces their enormous energy output. The observational program described here has now been completed and fully analyzed; the results are presented in the paper ``Hubble Space Telescope Images of a Sample of Twenty Nearby Luminous Quasars,''ApJ, 479, 642-658 (April 20, 1997) [also available from my home page under Recent Preprints and Reprints].

Back to John Bahcall Popular Papers
Address questions and comments about this server to webmaster@sns.ias.edu