The reflection effect in model stellar atmospheres. I - Grey atmospheres with convection
Abstract
The effect of external illumination on a plane-parallel grey stellar atmosphere in radiative or radiative + convective equilibrium is investigated theoretically as it applies to models of eclipsing binaries. The LTE model atmosphere developed by Gustafsson et al. (1975) for stars with Teff less than 8000 K is employed, and simulation results for atmospheres with and without convection are presented in extensive graphs and tables. Consideration is given to the reflection albedo, the bolometric reflection albedo, the effective reflection albedo for the convective case, and the effects of illumination on limb darkening. An expression permitting the estimation of limb darkening from the frequency, incidence angle, and relative flux of the incident light is derived, and the results for particular cases are shown to be in agreement with observations.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1985
- Bibcode:
- 1985A&A...147..281V
- Keywords:
-
- Binary Stars;
- Convection;
- Stellar Atmospheres;
- Stellar Models;
- Albedo;
- Atmospheric Models;
- Boundary Value Problems;
- Iterative Solution;
- Astrophysics