A photometric study of the contact binary EQ Tauri

doi:10.1086/344763

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	A photometric study of the contact binary EQ Tauri
	Yang YL(杨毓兰)1,2 ; Liu QY(刘清耀)1,2 ; Yang, YL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊	ASTRONOMICAL JOURNAL
	2002-12
卷号	124 期号:6 页码:3358-3363
DOI	10.1086/344763
产权排序	第1完成单位
收录类别	SCI
关键词	Binaries : Eclipsing Binaries : General Stars : Invidivudal (Eq Tauri) Stars : Spots
摘要	Light curves and photometric solutions for the contact binary EQ Tauri are presented. The light curves appear to exhibit a typical O'Connell effect, with primary maximum being 0.030 mag (V) and 0.032 mag (B) brighter than secondary maximum. From the present times of minimum light and those collected from the literature, changes in the orbital period of the system are analyzed. The results reveal that the orbital period of the system oscillates with a cycle of about 23 yr and an amplitude of 8.5 x 10(-7) days. The light curves and recent radial velocity curves from Rucinski et al. are analyzed simultaneously using the latest version of the Wilson-Devinney code. The results suggest that EQ Tau is a W Ursae Majoris contact binary of subtype A. The asymmetry of the light curves is explainable by starspot models. The cyclical period change can most probably be attributed to a magnetic activity cycle in the secondary component. The absolute dimensions of EQ Tau are found to be M-1 = 1.32(3) M-., M-2 = 0.59(2) M-., R-1 = 1.16(3) R-., R-2 = 0.82(3) R-., L-1 = 1.35(12) L-., L-2 = 0.64(6) L-., and A = 2.55(3) R-..
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6256
URL	查看原文
归档日期	2003-03-05
WOS记录号	WOS:000179361700027
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ORBITAL PERIOD MODULATION ; CLOSE BINARIES ; STARS
引用统计	被引频次：10[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/114a53/4134
专题	其他
通讯作者	Yang, YL (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位	1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Yang YL,Liu QY,Yang, YL . A photometric study of the contact binary EQ Tauri[J]. ASTRONOMICAL JOURNAL,2002,124(6):3358-3363.
APA	Yang YL,Liu QY,&Yang, YL .(2002).A photometric study of the contact binary EQ Tauri.ASTRONOMICAL JOURNAL,124(6),3358-3363.
MLA	Yang YL,et al."A photometric study of the contact binary EQ Tauri".ASTRONOMICAL JOURNAL 124.6(2002):3358-3363.

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