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Solar Physics

, Volume 212, Issue 1, pp 3–6 | Cite as

On the time scale of energy transport in the sun

  • Michael Stix
Article

Abstract

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 Ugas/Urad, 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.

Keywords

Radiation Energy Density Heat Capacity Thermal Energy Heat Transport 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Michael Stix
    • 1
  1. 1.Kiepenheuer-Institut für SonnenphysikFreiburgGermany

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