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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
Source PublicationNEW ASTRONOMY
2014-01
Volume26Pages:112-115
DOI10.1016/j.newast.2013.07.006
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars:Binary:Close Stars:Binaries:Eclipsing Stars:Individual (Ly Aur)
Abstract

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.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11103074] ; Chinese Natural Science Foundation[11203066]
Funding OrganizationChinese Natural Science Foundation[11133007, 11103074, 11203066]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2014-01-03
WOS IDWOS:000325510600013
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordECLIPSING BINARIES ; EVOLUTION ; SYSTEMS ; CEPHEI
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5909
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 AuthorZhao EG(赵二刚)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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.,...&Zhang J.(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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