The first photometric analysis of the totally eclipsing contact binary V811 Cep

Abstract

The first photometric analysis of V811 Cep was carried out. The first complete light curves of V, R and I bands are given. The analysis was carried out by Wilson-Devinney (W-D) program, and the results show that V811 Cep is a median-contact binary ($f=33.9(\pm 4.9)\%$) with a mass ratio of 0.285. It is a W-subtype contact binary, that is, the component with less mass is hotter than the component with more mass, and the light curves are asymmetric (O'Connell effect), which can be explained by the existence of a hot spot on the component with less mass. The orbital inclination is $i=88.3^{\circ }$, indicating that it is a totally eclipsing binary, so the parameters obtained are reliable. Through the O-C analyzing, it is found that the orbital period decreases at the rate of $\dot{P}=-3.90(\pm 0.06)\times 10^{-7}d\cdot y{r}^{-1}$, which indicates that the mass transfer occurs from the more massive component to the less massive one.

11 pages, 6 figures, and 5 table, accepted by RAA

References in corpus (6)

• The first WASP public data release
• Physical Properties and Catalogue of EW-type Eclipsing Binaries Observed by LAMOST
• Contact binaries at the short period cut-off I. statistics and the first photometric investigations of ten totally eclipsing systems
• The first photometric analysis of the W-subtype contact binary UCAC4 436-062932 with O'Connell effect
• YZ Phe: an active contact binary with variation of the O'Connell effect and orbital period change
• The first four-color photometric investigation of the W UMa type contact binary V868 Mon