Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...147..281v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 147, no. 2, June 1985, p. 281-299. Research supported by the Brazilian Educati
Astronomy and Astrophysics
Astrophysics
61
Binary Stars, Convection, Stellar Atmospheres, Stellar Models, Albedo, Atmospheric Models, Boundary Value Problems, Iterative Solution
Scientific paper
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.
Nordlund Aake
Vaz Luiz Paulo Ribeiro
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