On the time scale of energy transport in the sun

Details On the time scale of energy transport in the sun On the time scale of energy transport in the sun

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003soph..212....3s&link_type=abstract

Solar Physics, v. 212, Issue 1, p. 3-6 (2003).

Physics

2

Scientific paper

It is pointed out that the time scale of energy transport in the Sun is the Kelvin Helmholtz time scale, of order 3×107 years, roughly 100 times longer than the photon-diffusion 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.

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