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A SOLAR-TYPE STELLAR COMPANION TO A DEEP CONTACT BINARY IN A QUADRUPLE SYSTEM
Zhou X(周肖)1,2,3; Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2; Jiang, L. -Q.4; Zhang B(张斌)1,2,3; Kreiner, J.5
Source PublicationASTROPHYSICAL JOURNAL
2016-02-01
Volume817Issue:2
DOI10.3847/0004-637X/817/2/133
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V776 Cas)
Abstract

The four-color (B, V, R-c, I-c) light curves of V776 Cas are presented and analyzed using the Wilson-Devinney method. It is discovered that V776 Cas is an early F-type (F2V) overcontact binary with a very high contact degree (f = 64.6%) and an extremely low-mass ratio (q = 0.130), which indicate that it is at the final evolutionary stage of cool short-period binaries. The mass of the primary and secondary stars are calculated to be M-1 = 1.55 (+/- 0.04) M circle dot, M-2 = 0.20(+/- 0.01) M circle dot. V776 Cas is supposed to be formed from an initially detached binary system via the loss of angular momentum due to the magnetic wind. The initial masses of the present primary and secondary components are calculated to be M-1i = 0.86(+/- 0.10) M circle dot and M-2i = 2.13(+/- 0.04) M circle dot. The observed-calculated curve exhibits a cyclic period variation, which is due to the light-travel time effect caused by the presence of a third component with a period of 23.7 years. The mass of the third component is estimated to be M3 = 1.04(+/- 0.03) M circle dot and the orbital inclination of the third component is calculated to be i' = 33 degrees.1. The distance of the binary system to the mass center of the triple system is calculated to be a'(12) = 3.45 AU. The presence of the close-in tertiary component may play an important role in the formation and evolution of this binary system by drawing angular momentum from the central system.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000369437900050
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSTAR LIGHT CURVES ; VELOCITY CURVES ; RADIAL-VELOCITY ; UMA ; PARAMETERS ; EVOLUTION ; ORIGIN ; CASSIOPEIAE ; COMPONENTS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9333
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorZhou X(周肖)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, China
3.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
4.Department of Physics, School of Science, Sichuan University of Science & Engineering, Zigong, 643000, China
5.Mt. Suhora Astronomical Observatory, Pedagogical University of Cracow, Poland
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhou X,Qian SB,Zhang J,et al. A SOLAR-TYPE STELLAR COMPANION TO A DEEP CONTACT BINARY IN A QUADRUPLE SYSTEM[J]. ASTROPHYSICAL JOURNAL,2016,817(2).
APA Zhou X,Qian SB,Zhang J,Jiang, L. -Q.,Zhang B,&Kreiner, J..(2016).A SOLAR-TYPE STELLAR COMPANION TO A DEEP CONTACT BINARY IN A QUADRUPLE SYSTEM.ASTROPHYSICAL JOURNAL,817(2).
MLA Zhou X,et al."A SOLAR-TYPE STELLAR COMPANION TO A DEEP CONTACT BINARY IN A QUADRUPLE SYSTEM".ASTROPHYSICAL JOURNAL 817.2(2016).
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