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A low-mass-ratio and deep contact binary as the progenitor of the merger V1309 Sco
Zhu LY(朱俐颖)1,2,3; Zhao EG(赵二刚)1,2,3; Zhou X(周肖)1,2,3; Zhu, LY (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-04-01
卷号16期号:4
DOI10.1088/1674-4527/16/4/068
产权排序第1完成单位
收录类别SCI
关键词Stars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individuals (V1309 Sco) Stars: Evolution Stars: Mass-loss
摘要Nova Sco 2008 (=V1309 Sco) is an example of a V838 Mon type eruption rather than a typical classical nova. This enigmatic object was recently shown to have resulted from the merger of two stars in a contact binary. It is the first stellar merger that was identified to be undergoing a common envelope transient. To understand the properties of its binary progenitor, the pre-outburst light curves were analyzed by using the W-D method. The photometric solution of the 2002 light curve shows that it is a deep contact binary (f = 89.5 (+/- 40.5)%) with a mass ratio of 0.094. The asymmetry of the light curve is explained by the presence of a dark spot on the more massive component. The extremely high fill-out factor suggests that the merging of the contact binary is driven by dynamical mass loss from the outer Lagrange point. However, the analysis of the 2004 light curve indicates that no solutions were obtained even at an extremely low mass ratio of q = 0.03. This suggests that the common convective envelope of the binary system disappeared and the secondary component spiraled into the envelope of the primary in 2004. Finally, the ejection of the envelope of the primary produced the outburst.
项目资助者National Natural Science Foundation of China(11133007, 11325315, 11573063) ; Key Research Program of the Chinese Academy of Sciences(KGZD-EW-603) ; Science Foundation of Yunnan Province(2012HC011, 2013FB084) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09010202)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
归档日期2016-05-11
WOS记录号WOS:000375006700016
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]THERMAL RELAXATION OSCILLATION ; OVERCONTACT BINARY ; STELLAR MERGER ; CLOSE-BINARY ; LIGHT CURVES ; SYSTEMS ; CANDIDATE ; EVOLUTION ; SCORPII ; MODELS
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被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9586
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Zhu, LY (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.University of the Chinese Academy of Sciences, Beijing 100049, China
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Zhu LY,Zhao EG,Zhou X,et al. A low-mass-ratio and deep contact binary as the progenitor of the merger V1309 Sco[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(4).
APA Zhu LY,Zhao EG,Zhou X,&Zhu, LY .(2016).A low-mass-ratio and deep contact binary as the progenitor of the merger V1309 Sco.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(4).
MLA Zhu LY,et al."A low-mass-ratio and deep contact binary as the progenitor of the merger V1309 Sco".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.4(2016).
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