Predicted
versus measured sound speeds
This figure shows
the excellent agreement between the calculated (solar model BP98)
and the measured (Sun) sound
speeds, a fractional difference of 0.001 rms for all
speeds measured between 0.05 R
and 0.95 R.
There are no free parameters in the solar models.
The figure shows the
fractional difference, 
c/c,
between the predicted model sound speed and the
measured solar values as a function of radial position in the sun
(R is the solar radius).
The vertical scale is chosen so as
to emphasize that the fractional error is much smaller than generic fractional
changes in the model, 0.03 to 0.08, that might
significantly affect the solar neutrino predictions.
Predicted
solar neutrino fluxes
The standard solar model predictions
for the neutrino fluxes, are given together with the 1 sigma uncertainty
from all sources (combined quadratically). The software for
calculating the uncertainties is available here.
Color Viewgraph
Black and White Viewgraph
Back to John Bahcall's
Neutrino Viewgraphs
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