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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; Wang, JJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2014-11
卷号148期号:5
DOI10.1088/0004-6256/148/5/95
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (Cw Cas)
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.
项目资助者Chinese Natural Science Foundation [11133007, 10973037, 10903026, 11103074] ; West Light Foundation of the Chinese Academy of Science
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2014-11-03
WOS记录号WOS:000344141200021
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]RADIAL-VELOCITY ; LIGHT CURVES ; PERIOD CHANGES ; CONTACT BINARIES ; ORBITAL PERIOD ; CLOSE BINARIES ; CCD PHOTOMETRY ; STARS ; SYSTEMS ; WILSON
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被引频次:4[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/114a53/5893
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Wang, JJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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
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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,&Wang, JJ .(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).
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