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The first photometric investigation of the neglected close binary star AQ Com
Liu NP(刘念平)1,2,3; Qian SB(钱声帮)1,2,3; Wang JJ(王晶晶)1,2,3; Zhao EG(赵二刚)1,2; Snoonthornthum, B4; Zhu LY(朱俐颖)1,2,3; Zhou X(周肖)1,2,3; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2014-10
卷号32页码:31-35
DOI10.1016/j.newast.2014.04.002
产权排序第1完成单位
收录类别SCI
关键词Stars: Binaries: Close Stars: Binaries : Eclipsing Stars: Individual (Aq Com) Stars: Stellar Activity
摘要AQ Com is a W UMa-type binary star with a period of 0.28133 days that was discovered about fifty years ago. However, it was neglected for photometric investigation. Complete light curves in R-c and I-c bands are presented that show a positive O'Conell effect. The light maxima following the primary minima are higher than the other ones in both bands. Photometric solutions obtained with the W-D (Wilson and Devinney) method suggest that AQ Com is a contact binary with a contact degree of f = 21.4(+/- 6.2)%. It is found that the contact binary is a W-type system with a mass ratio of q = 2.86 where the less massive component is hotter than the more massive one in a common convective envelope. The asymmetries of the light curves are explained by two dark spots on the more massive component. By combining several determined times of light minimum with the others compiled from the literature, it is detected that the Observed-Calculated (O-C) curve may display a cyclic change with a period of 8.5 years and an amplitude of 0.0016 days. The cyclic oscillation may be caused by the presence of a cool third stellar object at an orbital separation of about similar to 4.2 AU. However, more data are needed to confirm the existence of the third body. (C) 2014 Elsevier B.V. All rights reserved.
项目资助者Chinese Natural Science Foundation [11133007, 11325315]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2014-07-03
WOS记录号WOS:000336874400007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIGHT CURVES
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被引频次:2[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/114a53/5896
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Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China
3.University of the Chinese Academy of Sciences, Beijing 100049, China
4.National Astronomical Research Insititude of Thailand, 191 Siriphanich Bldg., Huay Kaew Rd., Chiang Mai 50200, Thailand
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Liu NP,Qian SB,Wang JJ,et al. The first photometric investigation of the neglected close binary star AQ Com[J]. NEW ASTRONOMY,2014,32:31-35.
APA Liu NP.,Qian SB.,Wang JJ.,Zhao EG.,Snoonthornthum, B.,...&Qian, SB .(2014).The first photometric investigation of the neglected close binary star AQ Com.NEW ASTRONOMY,32,31-35.
MLA Liu NP,et al."The first photometric investigation of the neglected close binary star AQ Com".NEW ASTRONOMY 32(2014):31-35.
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