Physics 441/541 Spring 2012 Solutions for Problem Set 9 1. Four Illustrative Models: This problem examines four stellar models with approximately solar metallicity and M = 0.4, 1.0, 5.0, and 20.0 M . a) The table below lists some quantities for each model
Physics 441/541 Spring 2012 Solutions for Problem Set 8 1. Clayton Model: In this model for a star of mass M and radius R the pressure gradient is given by 4 dP = - G2 r exp(-r2 /a2 ), c dr 3 (1)
where a is a length parameter and c is the central density.
Physics 441/541 Spring 2012 Solutions for Problem Set 7 1. Solar Neutrinos: We expect the rate of the nuclear reaction p + 7 Be 8 B + , to be strongly temperature dependent because of the relatively large charge of the reactants (Zp = 1 and ZBe = 4). The
Physics 441/541 Spring 2012 Solutions for Problem Set 6 1. Convection: This problem calculates some quantities for convection in the Sun. a) Assuming hydrostatic equilibrium, dP/dr = -g, the pressure scale height can be written as dr P = - . h= P dP g Her