1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF
文献类型：期刊论文
| 作者 | Jiang LQ(江林巧)1,2,3 ; Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2,3; Zhou X(周肖)1,2,3
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2015-05 |
| 卷号 | 149期号:5 |
| ISSN号 | 0004-6256 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual (1SWASP J074658.62+224448.5) |
| 通讯作者 | Jiang, LQ (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | The first sets of high-quality light curves of the extremely short period eclipsing binary 1SWASP J074658.62+224448.5 (hereafter J074658) were obtained in 2012 and 2014. The photometric solutions were derived using the 2013 version of the Wilson-Devinney code. Two different modes of overcontact binaries were used to analyze the light curves, and the adopted solutions show that J074658 is a shallow contact system (the degree of contact is f = 13.1 +/- 2.1%) with a mass ratio of q= 0.386 +/- 0.017. The two components have very close temperatures, which may indicate that J074658 is in thermal contact. The variation of the orbital period was studied using all the available times of minimum light. According to the O - C diagram, the orbital period of J074658 shows an increase at a rate of P = 5.39 10(-7) days yr(-1) in about an eight-year span. The reasons for the period increase compared with other well-studied contact binaries with extremely short periods are discussed. The period increase may be caused by mass transfer from the less massive component to the more massive one, or it could be only part of a long period cyclic variation that may reveal the presence of a third body. In this paper, the latter is suggested. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CC-COMAE BERENICES ; SHALLOW CONTACT ; ECLIPSING BINARIES ; VELOCITY CURVES ; LIGHT CURVES ; STAR LIGHT ; LIMIT ; SYSTEM ; PARAMETERS ; CANDIDATES |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/149/5/169/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000354065200020 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5918]  |
| 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 of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.Graduate University of the Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, 100049 Beijing City, China |
| 推荐引用方式 GB/T 7714 | Jiang LQ,Qian SB,Zhang J,et al. 1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF[J]. ASTRONOMICAL JOURNAL,2015,149(5). |
| APA | Jiang LQ,Qian SB,Zhang J,&Zhou X.(2015).1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF.ASTRONOMICAL JOURNAL,149(5). |
| MLA | Jiang LQ,et al."1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF".ASTRONOMICAL JOURNAL 149.5(2015). |
入库方式： OAI收割
来源：云南天文台
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