The first photometric analysis and period investigation of the K-type W UMa type binary system V0842 Cep

Abstract

V0842 Cep is a W UMa-type binary star that has been neglected since its discovery. We analysed the VR${}_c$I${}_c$ light curves, obtained by the 1 m telescope at the Weihai Observatory of Shandong University, using the Wilson-Devinney code. V0842 Cep was found to be a shallow contact binary system (f=8.7$\%$) with a mass ratio of 2.281. Because its orbital inclination is greater than 80${}^{\circ }$, the photometric results are reliable. A period study is included which reveals a continually decreasing orbital period ($\frac{\mathrm{d}p}{\mathrm{d}t}$=1.50($\pm$0.42)$\times$10${}^{-7}$dyr${}^{-1}$). This trend could be attributed to the angular momentum loss via stellar wind.

10 pages, 6 figures, and 4 tables, accepted by RAA

References in corpus (6)

• The Gaia mission
• Physical Properties and Catalogue of EW-type Eclipsing Binaries Observed by LAMOST
• The first light curve modeling and orbital period change investigation of nine contact binaries around the short period cut-off
• Contact binaries at the short period cut-off I. statistics and the first photometric investigations of ten totally eclipsing systems
• Comprehensive Photometric Investigation of an Active Early K-type Contact System -- IL Cnc
• Photometric Investigation of the K-type Extreme-Shallow Contact Binary V1799 Orion

Cited by in corpus (1)

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