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Deep, low mass ratio overcontact binaries. II. IK Persei
Zhu LY(朱俐颖)1,2,3; Qian SB(钱声帮)1,2; Soonthornthum, B4; Yang YG(杨远贵)1,2,3; Zhu, LY (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2005-06
Volume129Issue:6Pages:2806-2814
DOI10.1086/430187
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries : Close Binaries : Eclipsing Stars : Evolution Stars : Individual (Ik Persei)
AbstractBV photometric light curves of the eclipsing binary IK Per were obtained during three nights in 2002 December. The photometric elements were computed using the Wilson-Devinney code. The results reveal that IK Per is an A-type overcontact binary system with a low mass ratio of q = 0.17 and a large degree of overcontact of 60%. The asymmetry of the light curves (i.e., the O'Connell effect) is explained by spot models. The observed long-term orbital period decrease [dP/dt = - (2.5 +/- 0.09) x 10(-7) days yr(-1)] is probably influenced by the presence of a third body in the system. The low mass ratio, high degree of overcontact, and secular orbital decrease all indicate that the situation of IK Per resembles those of FG Hya, GR Vir, and AW UMa. Because of the decrease of their orbital periods, the shrinking of the inner and outer critical Roche lobes will lead the common envelopes to overlap more, and finally the systems will evolve into single rapid-rotation stars.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2005-06-07
WOS IDWOS:000229472400025
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIMB-DARKENING COEFFICIENTS ; URSAE MAJORIS ; ORBITAL PERIOD ; LIGHT CURVES ; FG HYDRAE ; CE-LEONIS ; SYSTEM ; STARS ; MODEL
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5779
Collection双星与变星研究组
Corresponding AuthorZhu, LY (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, People's Republic of China
2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences, 100012 Beijing, People's Republic of China
3.Graduate School of the Chinese Academy of Sciences, 100012 Beijing, People's Republic of China
4.Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhu LY,Qian SB,Soonthornthum, B,et al. Deep, low mass ratio overcontact binaries. II. IK Persei[J]. ASTRONOMICAL JOURNAL,2005,129(6):2806-2814.
APA Zhu LY,Qian SB,Soonthornthum, B,Yang YG,&Zhu, LY .(2005).Deep, low mass ratio overcontact binaries. II. IK Persei.ASTRONOMICAL JOURNAL,129(6),2806-2814.
MLA Zhu LY,et al."Deep, low mass ratio overcontact binaries. II. IK Persei".ASTRONOMICAL JOURNAL 129.6(2005):2806-2814.
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