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1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit
Zhang B(张斌)1,2,3; Qian SB(钱声帮)1,2,3; Zejda, Miloslav4; Zhu LY(朱俐颖)1,2,3; Liu NP(刘念平)1,2; Zhang Bin(Chinese Acad Sci, Yunnan Observatories, POB 110, Kunming 650216, Peoples R China)
发表期刊NEW ASTRONOMY
2017-07-01
卷号54页码:52-55
DOI10.1016/j.newast.2017.01.007
产权排序第1完成单位
收录类别SCI
关键词Binary Eclipsing Binary Short-period Limit Light Curves
摘要First CCD photometric light curves of the eclipsing binary system 1SWASP J200503.05-343726.5 are presented. Our complete light curves in V, R and I bands using the Bessell filter show an out-of-eclipsing distortion, which means that the components of the system may be active. The preliminary photometric solutions with a cool star-spot are derived by using the 2013 version of the Wilson-Devinney (W-D) code. The photometric solutions suggest that 1SWASP J200503.05-343726.5 is a shallow-contact eclipsing binary(f = 9.0%) with a mass ratio of q= 1.0705, which is very high for late-type binary systems near the period limit. The primary component is about 230 K hotter than the secondary component. Based on our new CCD eclipse times, the orbital period change was analyzed. According to 0 C diagram, the orbital period of the 1SWASP 1200503.05-343726.5 shows an increase at a rate of <(P)over dot> = +5.43 x 10(-8) days year(-1). The period increase may be caused by mass transfer from the less massive component to the more massive one. This shallow-contact system may be formed from a detached short-period binary via orbital shrinkage because of dynamical interactions with a third component or by magnetic braking. (C) 2017 Elsevier B.V. All rights reserved.
项目资助者Chinese Natural Science Foundation(11133007, 11325315, 11203066) ; Strategic Priority Research Program(XDB09010202) ; Science Foundation of Yunnan Province(2012HC011) ; Ministry of Education, Youth and Sports of the Czech Republic(LG15010)
语种英语
学科领域天文学
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2017-05-22
WOS记录号WOS:000397369300007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STAR LIGHT CURVES ; CONTACT BINARY ; RADIAL-VELOCITY ; CLOSE BINARIES ; SYSTEM
引用统计
被引频次:1[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/114a53/10015
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Zhang Bin(Chinese Acad Sci, Yunnan Observatories, POB 110, Kunming 650216, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, PR China
3.Graduate University of Chinese Academy of Sciences, Beijing, PR China
4.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlár̆ská 2, Brno 611 37, Czech Republic
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Zhang B,Qian SB,Zejda, Miloslav,et al. 1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit[J]. NEW ASTRONOMY,2017,54:52-55.
APA Zhang B,Qian SB,Zejda, Miloslav,Zhu LY,Liu NP,&Zhang Bin.(2017).1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit.NEW ASTRONOMY,54,52-55.
MLA Zhang B,et al."1SWASP J200503.05-343726.5: A high mass ratio eclipsing binary near the period limit".NEW ASTRONOMY 54(2017):52-55.
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