On the time scale of energy transport in the sun
Abstract
It is pointed out that the time scale of energy transport in the Sun is the KelvinHelmholtz time scale, of order 3×10^{7} years, roughly 100 times longer than the photondiffusion time estimated by Mitalas and Sills (1992). The difference corresponds to a factor U_{gas}/U_{rad}, the ratio of thermal energy density to radiation energy density. Thus the heat transport, even when mediated by photons, is slowed down by the large heat capacity of the star. A numerical example calculation is presented.
 Publication:

Solar Physics
 Pub Date:
 January 2003
 DOI:
 10.1023/A:1022952621810
 Bibcode:
 2003SoPh..212....3S
 Keywords:

 Radiation;
 Energy Density;
 Heat Capacity;
 Thermal Energy;
 Heat Transport