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题名:
TYC 1337-1137-1 and TYC 3836-0854-1: Two Low-mass Ratio, Deep Overcontact Systems Near the End Evolutionary Stage of Contact Binaries
作者: Liao WP(廖文萍)1,2,3; Qian SB(钱声帮)1,2,3,4; Soonthornthum, B.5; Sarotsakulchai, T.1,4,5; Zhu LY(朱俐颖)1,2,3,4; Zhang J(张嘉)1,2,3; Irina, Voloshina6
刊名: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
出版日期: 2017-12-01
卷号: 129, 期号:982
DOI: 10.1088/1538-3873/aa8ded
学科分类: 天文学
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Liao, W. -P.(Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Yunnan, Peoples R China)
关键词: binaries: close ; binaries: eclipsing ; binaries: spectroscopic ; stars: evolution ; stars: individual (TYC 1337-1137-1 and TYC 3836-0854-1)
英文摘要: New high-precision CCD photometric light curves of two contact binary stars, TYC 1337-1137-1 and TYC 3836-0854- 1, are displayed and analyzed by using the Wilson-Devinney(W-D) program. The light curve solutions show that both of them are low-mass ratio, deep overcontact binary systems with a mass ratio of q = 0.1716. +/- 0.0010 and a high fillout factor of f. = 76.0. +/- 2.9% for TYC 1337-1137-1, and q = 0.1900. +/- 0.0032 and f = 79.4. +/- 7.9% for TYC 3836-0854-1, respectively. These results indicate that they are near the end evolutionary stage of contact binaries. The absolute parameters were calculated by using the new method of mass-radius relationship (0.238 +/- 0.009 M-circle dot and 1.386 +/- 0.050 M-circle dot for TYC 1337-1137-1, 0.228 +/- 0.014 M-circle dot and 1.20 +/- 0.07 M-circle dot for TYC 3836-0854-1, respectively). The preliminary orbital period analysis suggests that long-term period increases exist for both of them, which may be interpreted in two possible ways. A first possibility is mass transfer conservation from the less massive component to the more massive one leading to an orbital period increase. In this case, when their orbital angular momentum is less than three times the total spin angular momentum, they may evolve into a rapidly rotating single star. A second possibility is that the parabolic variation in the (O- C) diagram is only a part of a long-period cyclic change caused by a potential third body. In future, more high-precision observations of these two binaries are needed to confirm the form of orbital period changes.
项目资助者: National Natural Science Foundation of China(11403095, 11325315, 11611530685) ; Yunnan Natural Science Foundation(2014FB187) ; National Development and Reform Commission
语种: 英语
原文出处: 查看原文
ISSN号: 0004-6280
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: ECLIPSING BINARIES ; VELOCITY CURVES ; STARS ; LIGHT ; CATALOG
WOS记录号: WOS:000413750200002
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/11947
Appears in Collections:双星与变星研究组_期刊论文
中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
4.University of the Chinese Academy of Sciences, Yuquan Road 19#, Shijingshan Block, 100049 Beijing, China
5.National Astronomical Research Institute of Thailand, 191 Siripanich Bldg., Chiang Mai 50200, Thailand
6.Sternberg Astronomical Institute, Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia

Recommended Citation:
Liao WP,Qian SB,Soonthornthum, B.,et al. TYC 1337-1137-1 and TYC 3836-0854-1: Two Low-mass Ratio, Deep Overcontact Systems Near the End Evolutionary Stage of Contact Binaries[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2017,129(982).
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文件名: TYC 1337-1137-1 and TYC 3836-0854-1_ Two Low-mass Ratio, Deep Overcontact Systems Near the End Evolutionary Stage of Contact Binaries.pdf
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