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THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE
Liao WP(廖文萍)1,2; Qian SB(钱声帮)1,2,3; Li K(李凯)1,2,3; He JJ(何家佳)1,2; Zhao EG(赵二刚)1,2; Zhou X(周肖)1,2,3; Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2013-10
卷号146期号:4页码:79-
DOI10.1088/0004-6256/146/4/79
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (Ep Andromedae)
摘要New multi-color CCD photometric light curves of the eclipsing binary EP And were obtained over six nights in 2006, 2011, and 2012. Using the Wilson-Devinney code, we computed the photometric elements of this system. It was discovered that EP And is a W-type W UMa contact binary system with a mass ratio of q = 2.685 and a degree of contact factor f = 24.9%, rather than an A-type system. Combining 28 newly determined times of minimum light derived from 1999 to 2012 with others collected from the literature, a long-term increase (dP/dt = +5.22 x 10(-8) days yr(-1)) with a sinusoidal variation (A = 0.0109 days; T = 40.89 yr) in the orbital period was found. The orbital period secular increases may be interpreted as conservative mass transfer from the less massive component to the more massive one, and cyclic variations of the orbital period may be caused by the light-travel time effect through the presence of a third body. The evolutionary status and the age of the system are also discussed.
项目资助者Special Foundation of the President of The Chinese Academy of Sciences ; West Light Foundation of The Chinese Academy of Sciences ; Yunnan Natural Science Foundation [Y1XB041001] ; Chinese Natural Science Foundation [11133007, 11203066, 11103074]
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2013-11-05
WOS记录号WOS:000324404800008
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CYCLIC PERIOD CHANGES ; CLOSE BINARIES ; ADDITIONAL COMPONENTS ; EVOLUTIONARY STATUS ; ECLIPSING BINARY ; SYSTEMS ; CYGNI ; DEEP ; DRACONIS ; COMPANION
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被引频次:7[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/114a53/5876
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Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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, China
3.Graduate School of the CAS, Yuquan Road 19#, SijingShan Block, 100049 Beijing, China
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Liao WP,Qian SB,Li K,et al. THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE[J]. ASTRONOMICAL JOURNAL,2013,146(4):79-.
APA Liao WP.,Qian SB.,Li K.,He JJ.,Zhao EG.,...&Liao, WP .(2013).THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE.ASTRONOMICAL JOURNAL,146(4),79-.
MLA Liao WP,et al."THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE".ASTRONOMICAL JOURNAL 146.4(2013):79-.
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