Solution of light curves with third light contribution : the eclipsing binaries LY Aurigae and AH Cephei reconsidered.
Abstract
The Wilson-Devinney approach (Li and Leung, 1985) has been combined with a nonlinear optimization method in order to obtain the light curves of the early-type eclipsing binaries LY Aur and AH Cep. For LY Aur, the photometric solution suggests a configuration of marginal contact and yields a mass ratio of q = 0.62 which is close to the value derived by Popper (1982). For AH Cep, a third body is implied by (O-C) studies as well as by the presence of a third light. Different inclination angles are found to result from the old and new light curves of AH Cep. The results suggest that both LY Aur and AH Cep are eclipsing binaries with changing inclinations due to a third body.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1989
- Bibcode:
- 1989A&A...221...49D
- Keywords:
-
- Early Stars;
- Eclipsing Binary Stars;
- Light Curve;
- Ubv Spectra;
- Amplitudes;
- Companion Stars;
- Computational Astrophysics;
- Least Squares Method;
- Roche Limit;
- Astrophysics