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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.
发表期刊ASTRONOMICAL JOURNAL
2005-06
卷号129期号:6页码:2806-2814
DOI10.1086/430187
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收录类别SCI
关键词Binaries : Close Binaries : Eclipsing Stars : Evolution Stars : Individual (Ik Persei)
摘要BV 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.
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2005-06-07
WOS记录号WOS:000229472400025
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIMB-DARKENING COEFFICIENTS ; URSAE MAJORIS ; ORBITAL PERIOD ; LIGHT CURVES ; FG HYDRAE ; CE-LEONIS ; SYSTEM ; STARS ; MODEL
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5779
专题双星与变星研究组
通讯作者Zhu, LY (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 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
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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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