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A photometric study of the neglected eclipsing binary BS Cassiopeiae
Yang, YG1,2; Wei, JY1; He JJ(何家佳)3; Yang, YG (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2008-08
Volume136Issue:2Pages:594-601
DOI10.1088/0004-6256/136/2/594
Contribution Rank第3完成单位
Indexed BySCI
KeywordBinaries : Close Binaries : Eclipsing Stars : Individual (Bs Cassiopeiae)
AbstractWe present multicolor charge-coupled device (CCD) photometry for the eclipsing binary BS Cassiopeiae, observed on four nights between 2007 December and 2008 January. Using the Wilson -Devinney program, the photometric solution was derived from our BVR observations. Photometric results indicated that BS Cas is a W-subtype binary, whose mass ratio and overcontact degree are q = 0.2834(+/- 0.0010) and f = 31.6%(+/- 1.1%), respectively. Light curves of BS Cas present a typical O'Connell effect, which may be attributed to dark spot activity of the primary component. A detailed period analysis reveals that there exists a cyclic variation overlaying a secular period decrease, based on either all available light minimum times or recent light minimum times since 1989. The low-amplitude cyclic variation with a period of about 13 yr can be explained by either the light time effect or cyclic magnetic activity of both components. The long-term orbital period decrease suggests that BS Cas is undergoing mass transfer from the primary component to the secondary one. With its mass transfer and accompanying angular momentum loss, this binary will evolve into a deeper contact configuration.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
WOS IDWOS:000257680000007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD CHANGES ; URSAE MAJORIS SYSTEMS ; ANGULAR-MOMENTUM LOSS ; LIGHT CURVES ; CONTACT BINARIES ; VELOCITY CURVES ; TY BOOTIS ; STARS ; EVOLUTION ; PEGASI
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5810
Collection双星与变星研究组
Corresponding AuthorYang, YG (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, China
2.Department of Physics and Electric Information, Huaibei Coal Industry Teachers College, 235000 Huaibei, Anhui Province, China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, China
Recommended Citation
GB/T 7714
Yang, YG,Wei, JY,He JJ,et al. A photometric study of the neglected eclipsing binary BS Cassiopeiae[J]. ASTRONOMICAL JOURNAL,2008,136(2):594-601.
APA Yang, YG,Wei, JY,He JJ,&Yang, YG .(2008).A photometric study of the neglected eclipsing binary BS Cassiopeiae.ASTRONOMICAL JOURNAL,136(2),594-601.
MLA Yang, YG,et al."A photometric study of the neglected eclipsing binary BS Cassiopeiae".ASTRONOMICAL JOURNAL 136.2(2008):594-601.
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