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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; Zhou, X (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Peoples R China
发表期刊ASTROPHYSICAL JOURNAL
2016-02-01
卷号817期号:2
DOI10.3847/0004-637X/817/2/133
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V776 Cas)
摘要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.
项目资助者Chinese 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)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000369437900050
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STAR LIGHT CURVES ; VELOCITY CURVES ; RADIAL-VELOCITY ; UMA ; PARAMETERS ; EVOLUTION ; ORIGIN ; CASSIOPEIAE ; COMPONENTS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9333
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Zhou, X (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Peoples R China
作者单位1.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
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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.,...&Zhou, X .(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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