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LY Aurigua: A mass-transferring O-type contact binary with a tertiary stellar companion
Zhao EG(赵二刚)1,2; Qian SB(钱声帮)1,2,3; Li LJ(李临甲)1,2,3; He JJ(何家佳)1,2; Liu L(刘亮)1,2; Wang JJ(王晶晶)1,2,3; Zhang J(张嘉)1,2,3; Zhao, EG (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2014-01
卷号26页码:112-115
DOI10.1016/j.newast.2013.07.006
产权排序第1完成单位
收录类别SCI
关键词Stars:Binary:Close Stars:Binaries:Eclipsing Stars:Individual (Ly Aur)
摘要LY Aur is a contact massive close binary with a period of a little more than four days. The first O - C analysis of this early-type binary presented in this paper suggests that the period of the system is increasing continuously at a rate of dP/dt = +7.2 x 10(-7) days/year, while a cyclic oscillation with the period of 12.5 years is obvious. The long-term increasing can be explained by mass transfer from the less massive companion to the more one on the nuclear time-scale of less massive body, which suggests that the contact configuration will be broken and this binary will evolve into a semi-detached system. The periodic oscillation may be the consequence of the light-travel time effect of the third body, whose mass is no less than 3.4 M-circle dot. It is expected that the third body may play an important role for the origin and evolution of the system by removing angular momentum from the central system, making the eclipsing pairs to have a low angular momentum, while initially it may have had a longer orbital period, with larger angular momentum. The original system may have evolved into the present contact configuration via a case A mass transfer. (C) 2013 Elsevier B.V. All rights reserved.
项目资助者Chinese Natural Science Foundation [11133007, 11103074, 11203066]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2014-01-03
WOS记录号WOS:000325510600013
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ECLIPSING BINARIES ; EVOLUTION ; SYSTEMS ; CEPHEI
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5909
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Zhao, EG (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
3.University of the Chinese Academy of Sciences, Beijing 100049, China
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GB/T 7714
Zhao EG,Qian SB,Li LJ,et al. LY Aurigua: A mass-transferring O-type contact binary with a tertiary stellar companion[J]. NEW ASTRONOMY,2014,26:112-115.
APA Zhao EG.,Qian SB.,Li LJ.,He JJ.,Liu L.,...&Zhao, EG .(2014).LY Aurigua: A mass-transferring O-type contact binary with a tertiary stellar companion.NEW ASTRONOMY,26,112-115.
MLA Zhao EG,et al."LY Aurigua: A mass-transferring O-type contact binary with a tertiary stellar companion".NEW ASTRONOMY 26(2014):112-115.
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