Period change of the eclipsing binary CQ Cep.
Abstract
The analysis of period changes in the eclipsing Wolf-Rayet binary system CQ Cep (WN7+O7, p ≈ 1d.64) is carried out using photographic and photoelectric observations of the years 1899 - 1985. The modified Hertzsprung method for calculating O-C values has been used. It is concluded that the period of CQ Cep has been decreasing in the time interval of 1899 - 1985 on an average at the rate of p= -0.014±0.004 s/year.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- May 1987
- Bibcode:
- 1987PAZh...13..417A
- Keywords:
-
- Cepheid Variables;
- Eclipsing Binary Stars;
- Secular Variations;
- Wolf-Rayet Stars;
- Astronomical Photography;
- Electrophotometry;
- Errors;
- Minima;
- Rates (Per Time);
- Astrophysics