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Is There a Substellar Object Orbiting the Solar-like Stable Contact Binary V2284 Cyg?
Wang, J.-J.1; Jiang, L.-Q.2; Zhang B(张斌)3; Zhao, S.-Q.1; Yu, J.1
Source PublicationPublications of the Astronomical Society of the Pacific
2017-10-24
Volume129Issue:982
DOI10.1088/1538-3873/aa8bb0
Contribution Rank第3完成单位
Indexed BySCI
Keyword(Stars:) Binaries (Including Multiple): Close Stars: Solar-type Stars: Evolution
Abstract

Abstract V2284 Cyg is a neglected W UMa-type binary star for photometric investigations. Monitored by the Kepler Space Telescope from 2009 to 2013, its light curves are continuously stable, suggesting that both components are inactive during this time interval. Based on the short-cadence observations, we determined the photometric solutions by using the 2013 version of the Wilson-Devinney code. These parameters reveal that V2284 Cyg is a W-type system with a degree of contact factor of f?=?39.23% and a mass ratio of q?=?2.90. Meanwhile, hundreds of times of minimum light were obtained and applied to analyze the orbital period changes. In the O-C diagram, a small-amplitude cyclic oscillation (A3?=?0.00030 days and T3?=?2.06 years) superimposed on a secular decreasing was found. The continuous decreasing may be a result from the mass transfer from the more massive component to the less massive one. With the long-term decreasing of the orbital period, this binary will evolve into a deeper contact system. Because the light curve is stable, the cyclic variation is plausibly explained as the light-travel time effect (LTTE) due to the presence of an additional body. The mass of the companion is M 3 sin i ′ = 0.036 ( ± 0.003 ) M ⊙ . If the orbital plane inclination is a random distribution, it is a brown dwarf with 66.7% probability. Therefore, the companion of V2284 Cyg is possibly the first candidate of the brown dwarf orbiting around contact binary, where both component are sharing a common convective envelope.

Funding ProjectResearch Foundation of China University of Petroleum-Beijing At Karamay[RCYJ2016B-03-006] ; Sichuan University of Science and Engineering[2015RC42] ; National Natural Science Foundation of China[U1631108]
Funding OrganizationResearch Foundation of China University of Petroleum-Beijing At Karamay[RCYJ2016B-03-006] ; Sichuan University of Science and Engineering[2015RC42] ; National Natural Science Foundation of China[U1631108]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6280
URL查看原文
WOS IDWOS:000413706200002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordEclipsing Binary ; Hierarchical Triple ; Kepler Photometry ; Velocity Curves ; Comae Berenices ; Variable-stars ; Close Binaries ; Light Curves ; Hd 181068 ; Period 作者信息
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11958
Collection双星与变星研究组
Corresponding AuthorWang, J.-J.
Affiliation1.China University of Petroleum–Beijing at Karamay, Anding Road 355, 834000 Karamay, China
2.School of Physics and Electronic Engineering, Sichuan University of Science Engineering, 643000 Zigong, China
3.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, China
Recommended Citation
GB/T 7714
Wang, J.-J.,Jiang, L.-Q.,Zhang B,et al. Is There a Substellar Object Orbiting the Solar-like Stable Contact Binary V2284 Cyg?[J]. Publications of the Astronomical Society of the Pacific,2017,129(982).
APA Wang, J.-J.,Jiang, L.-Q.,Zhang B,Zhao, S.-Q.,&Yu, J..(2017).Is There a Substellar Object Orbiting the Solar-like Stable Contact Binary V2284 Cyg?.Publications of the Astronomical Society of the Pacific,129(982).
MLA Wang, J.-J.,et al."Is There a Substellar Object Orbiting the Solar-like Stable Contact Binary V2284 Cyg?".Publications of the Astronomical Society of the Pacific 129.982(2017).
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