Transfer of X-rays through a spherically symmetric gas cloud.
Abstract
Approximate solutions are presented for the transfer of radiation through spherically symmetric gas clouds surrounding a point source of X-rays. The approach is similar to that of Tarter and Salpeter (1969) except that heating by Compton scattering and the Auger effect is included. The temperature and ionization structure are sensitive to the source spectrum, and the solutions are not unique if soft X-rays are deficient. The emergent spectrum is rich in optical, ultraviolet, and X-ray emission lines. The radiation force due to photoelectric absorption of X-rays may exceed the force due to Compton scattering by a factor of order 10 for the radiation fields and densities likely to be encountered in galactic binary X-ray sources.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1976
- DOI:
- 10.1086/154448
- Bibcode:
- 1976ApJ...206..847H
- Keywords:
-
- Auger Effect;
- Compton Effect;
- Emission Spectra;
- Radiative Transfer;
- Stellar Models;
- X Ray Stars;
- Atmospheric Models;
- Binary Stars;
- Gas Dynamics;
- Line Spectra;
- Optical Thickness;
- Radiant Flux Density;
- Radiation Pressure;
- Ultraviolet Radiation;
- X Ray Spectra;
- Space Radiation