The first photometric investigation of the neglected close binary star AQ Com

	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, B 4; Zhu LY(朱俐颖)1,2,3 ; Zhou X(周肖)1,2,3
刊名	NEW ASTRONOMY
	2014-10
卷号	32 页码:31-35
关键词	Stars: binaries: close Stars: binaries : eclipsing Stars: individual (AQ Com) Stars: stellar activity
ISSN号	1384-1076
通讯作者	Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LIGHT CURVES
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1384107614000554
语种	英语
WOS记录号	WOS:000336874400007
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5896]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
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
推荐引用方式 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.