PHOTOMETRIC ANALYSIS OF THE OVERCONTACT BINARY CW CAS

	PHOTOMETRIC ANALYSIS OF THE OVERCONTACT BINARY CW CAS
	Wang JJ(王晶晶)1,2,3 ; Qian SB(钱声帮)1,2,3 ; He JJ(何家佳)1,2,3 ; Li LJ(李临甲)1,2,3 ; Zhao EG(赵二刚)1,2,3
刊名	ASTRONOMICAL JOURNAL
	2014-11
卷号	148 期号:5
关键词	binaries: close binaries: eclipsing stars: individual (CW Cas)
ISSN号	0004-6256
通讯作者	Wang, JJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	New CCD photometric observations of overcontact binary CWCas were carried out in 2004 and 2011. In particular, the light curve obtained in 2004 shows a remarkable O'Connell effect. Compared with light curves in different observing seasons, variations were found. These variations can be explained by dark spot activities on the surface of at least one component. Using the Wilson-Devinney code with a spot model, we find that the photometric solutions confirm CWCas is a shallow W-subtype overcontact binary with a spotted massive component. Our new determined times of minimum light together with the others published in the literature were analyzed to find a change of orbital period. From the O - C curves, the period of the system shows a cyclic period change (P-3 = 69.9 yr, A(3) = 0.03196 days) superposed on the linear increase. The cyclic variation, if explained as the light-travel time effect, reveals the presence of a tertiary companion.
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]	RADIAL-VELOCITY ; LIGHT CURVES ; PERIOD CHANGES ; CONTACT BINARIES ; ORBITAL PERIOD ; CLOSE BINARIES ; CCD PHOTOMETRY ; STARS ; SYSTEMS ; WILSON
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-6256/148/5/95/meta
语种	英语
WOS记录号	WOS:000344141200021
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5893]
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.National Astronomical Observatories/Yunnan Observatories, 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, 650011 Kunming, PR China 3.Graduate School of the Chinese Academy of Sciences, Yuquan Road 19, Shijingshan Block, 100049 Beijing, PR China
推荐引用方式 GB/T 7714	Wang JJ,Qian SB,He JJ,et al. PHOTOMETRIC ANALYSIS OF THE OVERCONTACT BINARY CW CAS[J]. ASTRONOMICAL JOURNAL,2014,148(5).
APA	Wang JJ,Qian SB,He JJ,Li LJ,&Zhao EG.(2014).PHOTOMETRIC ANALYSIS OF THE OVERCONTACT BINARY CW CAS.ASTRONOMICAL JOURNAL,148(5).
MLA	Wang JJ,et al."PHOTOMETRIC ANALYSIS OF THE OVERCONTACT BINARY CW CAS".ASTRONOMICAL JOURNAL 148.5(2014).