Photon escape probabilities in a semiinfinite planeparallel medium
Abstract
It is shown in this work how to obtain the probabilities of photons escaping from a cold electron plasma environment after having undergone an arbitrary number of scatterings. This is done by retaining the exact differential cross section for Thomson scattering as opposed to using its polarization and angle averaged form. The results are given in the form of recursion relations. The geometry used is the semiinfinite planeparallel geometry witlh a photon source located on a plane at an arbitrary optical depth below the surface. Analytical expressions are given for the probabilities which are accurate over a wide range of initial optical depth. These results can be used to model compact Xray galactic sources which are surrounded by an electronrich plasma.
 Publication:

The Astrophysical Journal
 Pub Date:
 January 1984
 DOI:
 10.1086/161656
 Bibcode:
 1984ApJ...276..691W
 Keywords:

 Electron Plasma;
 Photons;
 Radiative Transfer;
 Scattering Cross Sections;
 X Ray Sources;
 Escape;
 Green'S Functions;
 Optical Thickness;
 Probability Theory;
 Thomson Scattering;
 Astrophysics