Multidimensional radiative transfer in stratified atmospheres - Gray radiative equilibrium

Details Multidimensional radiative transfer in stratified atmospheres - Gray radiative equilibrium Multidimensional radiative transfer in stratified atmospheres - Gray radiative equilibrium

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....79...14k&link_type=abstract

Astronomy and Astrophysics, vol. 79, no. 1-2, Oct. 1979, p. 14-21.

Physics

Optics

11

Atmospheric Stratification, Photosphere, Radiative Transfer, Stellar Atmospheres, Atmospheric Models, Atmospheric Optics, Equilibrium, Opacity, Optical Thickness, Stellar Interiors

Scientific paper

This paper tests the validity of the multidimensional Eddington, or diffusion, approximation in radiative transfer in a gray radiative-equilibrium atmosphere with opacity increasing exponentially toward the stellar interior. The diffusion approximation is unacceptable at small optical depths. The height dependence of intensity fluctuations is studied systematically by adopting the above simplified model atmosphere for the solar photosphere. Lateral radiative exchange is efficient and drastically damps the fluctuations in the uppermost layers.

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