On the photon diffusion time scale for the sun

Details On the photon diffusion time scale for the sun On the photon diffusion time scale for the sun

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...401..759m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 401, no. 2, p. 759, 760.

Astronomy and Astrophysics

Astrophysics

4

Diffuse Radiation, Radiative Transfer, Solar Interior, Solar Radiation, Stellar Structure, Diffusion, Random Walk, Stellar Convection, Stellar Models

Scientific paper

It is pointed out that the common choice of 0.5-1.0 cm for the average step length of a photon diffusing through the sun gives a diffusion time scale which is too short by an order of magnitude. Simple random walk theory with step lengths determined from a solar model gives the value of 0.090 cm for the average step length, which gives 170,000 yr for the diffusion time scale of the present sun.

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