Solar Models: Current Epoch and Time Dependences, Neutrinos, and
Normalized solar luminosity vs. solar age for the standard solar model
(solid curve) and for three "deficient" solar models: the No Diffusion
model (dotted curve), the S34 = 0 model
(short-dashed curve), and the Mixed model (long-dashed curve).
Depth of the convective zone, R(CZ,t), as a function of age
for the standard solar model. The depth of the convective zone is
approximately proportional to the contemporary solar radius. The
solar age is measured in units of 109 yr.
Mass included within the convective zone, M(CZ,t), as a
function of age for the standard solar model. The mass of the
convective zone is measured in units of M (today), and the
solar age is measured in units of 109yr. The mass of the
convective zone is approximately proportional to R(t)-2.
Temporal evolution of the central temperature, density, pressure, and
hydrogen mass fraction. The figure shows the computed values for the
standard solar model of the central temperature (solid line), pressure
(dot-dashed line), density (dashed line), and hydrogen mass fraction
Electron number density, ne, vs. solar radius for
the standard solar model (BP2000). The straight-line fit shown is an
approximation given by Bahcall (1989).
Predicted vs. measured sound speeds. The figure shows the excellent
agreement between the calculated sound speeds for the standard solar
model (BP2000) and the helioseismologically measured (Sun) sound
speeds. The horizontal line at 0.0 represents the hypothetical case
in which the calculated sound speeds and the measured sound speeds
agree exactly everywhere in the Sun.
Calculated solar sound speed vs. radius for the standard solar model,
BP2000. To an accuracy of about 0.5 km s-1 the calculated
and observed sound speeds are the same.
Six precise helioseismological measurements vs. BP2000. The figure
compares the fractional difference between the sound speeds calculated
for the standard solar model (BP2000) and the sound speeds in six
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