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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
Source PublicationNEW ASTRONOMY
2014-10
Volume32Pages:31-35
DOI10.1016/j.newast.2014.04.002
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries : Eclipsing Stars: Individual (Aq Com) Stars: Stellar Activity
Abstract

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.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2014-07-03
WOS IDWOS:000336874400007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIGHT CURVES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5896
Collection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
Corresponding AuthorQian SB(钱声帮)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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.,...&Zhou X.(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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