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1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF
Jiang LQ(江林巧)1,2,3; Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2,3; Zhou X(周肖)1,2,3; Jiang, LQ (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2015-05
卷号149期号:5
DOI10.1088/0004-6256/149/5/169
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 (1swasp j074658.62+224448.5)
摘要The first sets of high-quality light curves of the extremely short period eclipsing binary 1SWASP J074658.62+224448.5 (hereafter J074658) were obtained in 2012 and 2014. The photometric solutions were derived using the 2013 version of the Wilson-Devinney code. Two different modes of overcontact binaries were used to analyze the light curves, and the adopted solutions show that J074658 is a shallow contact system (the degree of contact is f = 13.1 +/- 2.1%) with a mass ratio of q= 0.386 +/- 0.017. The two components have very close temperatures, which may indicate that J074658 is in thermal contact. The variation of the orbital period was studied using all the available times of minimum light. According to the O - C diagram, the orbital period of J074658 shows an increase at a rate of P = 5.39 10(-7) days yr(-1) in about an eight-year span. The reasons for the period increase compared with other well-studied contact binaries with extremely short periods are discussed. The period increase may be caused by mass transfer from the less massive component to the more massive one, or it could be only part of a long period cyclic variation that may reveal the presence of a third body. In this paper, the latter is suggested.
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, 2013FB084]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2015-06-04
WOS记录号WOS:000354065200020
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CC-COMAE BERENICES ; SHALLOW CONTACT ; ECLIPSING BINARIES ; VELOCITY CURVES ; LIGHT CURVES ; STAR LIGHT ; LIMIT ; SYSTEM ; PARAMETERS ; CANDIDATES
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被引频次:8[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/114a53/5918
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Jiang, LQ (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 of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.Graduate University of the Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, 100049 Beijing City, China
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Jiang LQ,Qian SB,Zhang J,et al. 1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF[J]. ASTRONOMICAL JOURNAL,2015,149(5).
APA Jiang LQ,Qian SB,Zhang J,Zhou X,&Jiang, LQ .(2015).1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF.ASTRONOMICAL JOURNAL,149(5).
MLA Jiang LQ,et al."1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF".ASTRONOMICAL JOURNAL 149.5(2015).
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