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V524 Monocerotis: A Marginal Contact Binary with a Cyclic Period Variation
He JJ(何家佳)1,2,3; Wang JJ(王晶晶)1,2,3; Qian SB(钱声帮)1,2,3; He, JJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2012-08-25
卷号64期号:4页码:85-
DOI10.1093/pasj/64.4.85
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 (V524 Monocerotis)
摘要We have secured and analyzed three-color light curves of V524 Monocerotis with the 2003 version of the Wilson-Devinney code. We confirmed that V524 Mon is a shallow W-type contact binary system with a mass ratio of q = 2.099 and a degree of contact factor of f = 7.7%. Based on the new eight times of the light minima and those published by previous investigators, we find that the orbital period of the binary shows a long-term decrease (dp/dt = -1.52 x 10(-10)), while it undergoes a cyclic oscillation (T-3 = 23.93 yr, A(3) = 0.0082d). The long-term period decrease can be explained by mass transfer from the primary to the secondary. The cyclic change, explained as the light-travel time effect, reveals the presence of a tertiary companion. The marginal contact configuration and the continuous period decrease both suggest that the system may be a newly formed contact binary.
项目资助者Chinese Natural Science Foundation [10973037, 10903026, 10878012] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2012-12-19
WOS记录号WOS:000309296600022
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STARS
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被引频次:5[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/114a53/5862
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He, JJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P. O. Box 110, 650011 Kunming, P. R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences.
3.Graduate School of the Chinese Academy of Sciences, Yuquan Road 19#, SijingShan Block, 100049, Beijing City, P. R. China.
推荐引用方式
GB/T 7714
He JJ,Wang JJ,Qian SB,et al. V524 Monocerotis: A Marginal Contact Binary with a Cyclic Period Variation[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2012,64(4):85-.
APA He JJ,Wang JJ,Qian SB,&He, JJ .(2012).V524 Monocerotis: A Marginal Contact Binary with a Cyclic Period Variation.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,64(4),85-.
MLA He JJ,et al."V524 Monocerotis: A Marginal Contact Binary with a Cyclic Period Variation".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 64.4(2012):85-.
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