The reflection effect in very close eclipsing binary systems with distorted components
Abstract
The analytical formula for the reflection effect is discussed for a system with spherical components. By numerical integration the reflection is computed at phase angles φ = 0° and 90°. The position of the photocenter at the elongations can then be compared using both approaches. A new method of computing the reflection effect by numerical integration is developed both for the rotational ellipsoids, used extensively in the practical interpretation of light curves and for models used in the theory of distorted components. The surface brightness in the direction of the normal and the fractional temperature increase are given for several models. It is found that the dynamical distortion of the components tends to increase the phase function at φ = 0° but that the photometric darkening of the tidal bulge due to gravity effect tends to decrease the phase function again.
 Publication:

Vistas in Astronomy
 Pub Date:
 1974
 DOI:
 10.1016/00836656(74)900051
 Bibcode:
 1974VA.....16...85B
 Keywords:

 Astronomical Models;
 Eclipsing Binary Stars;
 Light Curve;
 Numerical Integration;
 Optical Reflection;
 Ellipsoids;
 Gravitational Effects;
 Limb Darkening;
 Phase Shift;
 Polar Coordinates;
 Stellar Structure;
 Stellar Temperature;
 Astrophysics