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题名:
Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis
作者: Zhou X(周肖)1,2,3; Qian SB(钱声帮)1,2,3,4; Zhang B(张斌)1,2,3,4
刊名: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
出版日期: 2017-04-01
卷号: 69, 期号:2
DOI: 10.1093/pasj/psx010
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: Zhou, Xiao(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)
关键词: binaries: close ; binaries: eclipsing ; stars: individual (NO Camelopardalis)
英文摘要: 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
原文出处: 查看原文
ISSN号: 0004-6264
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]: CONTACT BINARY ; STELLAR COMPANION ; SHALLOW CONTACT ; LIGHT CURVES ; STARS ; SYSTEM ; DEEP
WOS记录号: WOS:000401118500023
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/10069
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, 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

Recommended Citation:
Zhou X,Qian SB,Zhang B. Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(2).
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文件名: Multi-color photometric investigation of the totally eclipsing binary NO Camelopardalis.pdf
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