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Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis
Zhou X(周肖)1,2,3; Qian SB(钱声帮)1,2,3,4; Zhang B(张斌)1,2,3,4; Zhou, Xiao(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017-04-01
卷号69期号:2
DOI10.1093/pasj/psx010
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (No Camelopardalis)
摘要Multi-color photometric light curves of NO Camelopardalis in V, R-C, and I-C bands are obtained and analyzed simultaneously using the Wilson-Devinney program. The solutions suggest that NO Cam is an A-subtype overcontact binary with a mass ratio of q = 0.439 and a contact degree of f = 55.5%. The small temperature difference (Delta T = 44 K) between its two components indicates that the system is under thermal contact. The high orbital inclination (i = 84.degrees 5) strengthens our confidence in the parameters determined from the light curves. All available times of minimum light are collected and period variations are analyzed for the first time. The O-C curve reveals that its period is increasing continuously at a rate of dP/dt = + 1.46 x 10(-9), which can be explained by mass transfer from the less massive component to the more massive one. After the upward parabolic variation is subtracted, the residuals suggest that there may be a cyclic variation with a period of 2.23 yr and an amplitude of A(3) = 0.00153 d, which may due to the light-travel-time effect arising from the gravitational influence of a close-in tertiary component. The close-in companion reveals that early dynamic interaction among a triple system may have played a very important role in the formation of the WUMa-type binaries.
项目资助者Chinese Natural Science Foundation(11133007, 11325315, 11203066, 11403095) ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences(XDB09010202) ; Science Foundation of Yunnan Province(2012HC011, 2014FB187)
语种英语
学科领域天文学
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2017-05-18
WOS记录号WOS:000401118500023
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CONTACT BINARY ; STELLAR COMPANION ; SHALLOW CONTACT ; LIGHT CURVES ; STARS ; SYSTEM ; DEEP
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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/114a53/10069
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Zhou, Xiao(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, P.R. China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P.R. China
4.Graduate University of the Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, 100049 Beijing, P.R. China
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Zhou X,Qian SB,Zhang B,et al. Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(2).
APA Zhou X,Qian SB,Zhang B,&Zhou, Xiao.(2017).Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,69(2).
MLA Zhou X,et al."Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69.2(2017).
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