Period variations of the late type contact binaries YY ERI and AE Phe: how to use light curves outside minimum.
Abstract
We present and compare minimum times, computed for light curves of the W Uma type binaries YY Eri and AE Phe. Two different methods are used: the Leiden method formulated by Kwee & van Woerden and the light curve synthesis method developed by Wilson & Devinney. It is shown that the latter gives more and better information, and is even capable to extract the times of conjunction. Its application requires a complete analysis of the parameters of the system, including the surface inhomogeneities. The observations are available in electronic form.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1994
- Bibcode:
- 1994A&A...289..871M
- Keywords:
-
- Binary Stars;
- Computation;
- Light Curve;
- Minima;
- Periodic Variations;
- Data Reduction;
- Phase Shift;
- Statistical Analysis;
- Astronomy;
- BINARIES: CLOSE;
- STARS: YY ERI;
- AE PHE;
- METHODS: DATA ANALYSIS