THE MULTI-COLOR LIGHT CURVES OF THE W UMa TYPE CONTACT BINARY EP ANDROMEDAE
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2013-10 |
| 卷号 | 146期号:4页码:79- |
| 关键词 | binaries: close binaries: eclipsing stars: individual (EP Andromedae) |
| ISSN号 | 0004-6256 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liao, WP (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CYCLIC PERIOD CHANGES ; CLOSE BINARIES ; ADDITIONAL COMPONENTS ; EVOLUTIONARY STATUS ; ECLIPSING BINARY ; SYSTEMS ; CYGNI ; DEEP ; DRACONIS ; COMPANION |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/146/4/79/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000324404800008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5876]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 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 |
| 推荐引用方式 GB/T 7714 | 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,&Zhou X.(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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来源：云南天文台
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