Photon escape probabilities in expanding atmospheres

Details Photon escape probabilities in expanding atmospheres Photon escape probabilities in expanding atmospheres

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981japa....2...81p&link_type=abstract

Journal of Astrophysics and Astronomy, vol. 2, Mar. 1981, p. 81-86.

Astronomy and Astrophysics

Astrophysics

2

Atmospheric Scattering, Escape Velocity, Frequency Distribution, Gas Expansion, Photons, Radiative Transfer, Diffusion, Distribution Functions, Ion Density (Concentration), Resonance Lines

Scientific paper

A comparison of mean number of scatterings and escape probabilities has been made in isotropic scattering and dipole scattering by using the angle-averaged partial frequency redistribution function. The equations of radiative transfer and statistical equilibrium have been solved simultaneously in a spherically symmetric expanding atmosphere. Two cases of atmospheric extension where the ratios of outer to inner atmospheric radii are 3 and 10 have been treated. It is found that the partial frequency redistribution gives a larger mean number of scatterings compared to that given by complete redistribution. Velocities tend to reduce the mean number of scatterings and increase the mean escape probabilities.

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