Photometric Investigation of the Contact Binary GU Ori with High Metallicity

Abstract

GU Ori was observed with the 1m telescope at Yunnan Observatories in 2005. To determine its physical properties, the Wilson-Devinney program is used. The results reveal that GU Ori is a W-subtype shallow contact binary with a more massive but cooler star 2. The mass of its two component stars are estimated to be $M_1=0.45M_{\odot }$, $M_2=1.05M_{\odot }$. The O'Connell effect was reported to be negative on the light curves observed in 2005. However, it changed to a positive one on the light curves observed from 2011 to 2012. The mean surface temperatures of star 2 ($T_2$) determined by the two sets of light curves were different, which may result from stellar activities. The O - C diagram shows that the period of GU Ori is decreasing at a rate of $dP/dt=-6.24\times 10^{-8}day\cdot yea{r}^{-1}$, which may be caused by mass transfer from star 2 to star 1 with a rate of $\frac{d{M}_2}{dt}=-2.98\times 10^{-8}{M}_{\odot }/year$. GU Ori is a contact binary with quite high metallicity.

17 pages, 6 figures

References in corpus (6)

• Physical Properties and Catalogue of EW-type Eclipsing Binaries Observed by LAMOST
• A Solar-type Stellar Companion to a Deep Contact Binary in a Quadruple System
• The first photometric analysis of the overcontact binary MQ UMa with an additional component
• Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion
• The first photometric analysis of the W-subtype contact binary UCAC4 436-062932 with O'Connell effect
• The Photometric Investigation of V921 Her using the Lunar-based Ultraviolet Telescope of Chang'e-3 mission

Cited by in corpus (6)

• A Study of Twelve Potential Merger Candidate Contact Binary Systems
• Photometric investigation and orbital period analyses of the W UMa binaries FP Lyn, FV CVn and V354 UMa
• Detection of a cyclic period change in the contact binary TU UMi
• Photospheric silicon abundances of upper main-sequence stars derived from Si II 6347/6371 doublet lines
• Photometric and Spectroscopic Study of Two Low Mass Ratio Contact Binary Systems: CRTS J225828.7-121122 and CRTS J030053.5+230139
• Orbital period correction and light curve modeling of the W-subtype shallow contact binary OWLeo