The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475
文献类型：期刊论文
| 作者 | Yang, Y. -G.1,2; Wei, J. Y.1; Li, H. -L1 |
| 刊名 | NEW ASTRONOMY
 |
| 出版日期 | 2010 |
| 卷号 | 15期号:1页码:155-158 |
| 关键词 | Binaries: eclipsing Binaries: close Individuals: GSC 1387-0475-stars: multiple |
| 英文摘要 | CCD photometric observations of the shortest period field contact binary, GSC 1387-0475, obtained in the observing season in 2008-2009, are presented. From new observations, eleven light minimum times were derived and the orbital period was revised. The light curves in BVR bands were analyzed using the W-D program. It is found that GSC 1387-0475 is an overcontact binary. The derived absolute physical parameters of this binary are: M(p) = 0.443(+/- 0.004)M(circle dot), M(s) = 0.210(+/- 0.003)M(circle dot), R(p) = 0.658(+/- 0.008)R(circle dot), R(s) = 0.496(+/- 0.011)R(circle dot), L(p) = 0.188(+/- 0.005)L(circle dot), and L(s) = 0.090(+/- 0.004)L(circle dot). From the LogL-LogM diagram, the primary component is found to be an evolved star. The additional component of GSC 1387-0475 may remove angular momentum from the central system. With the angular momentum decreasing, the separation between components may decrease, which will cause the inner and out critical Roche lobes to shrink, resulting in an increase degree of overcontact. Finally, GSC 1387-0475 with a deep overcontact degree (i.e., f = 76.3 +/- 2.9%) may evolve into a rapid-rotating single star. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270638000022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7765]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Huaibei Coal Ind Teachers Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Y. -G.,Wei, J. Y.,Li, H. -L. The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475[J]. NEW ASTRONOMY,2010,15(1):155-158. |
| APA | Yang, Y. -G.,Wei, J. Y.,&Li, H. -L.(2010).The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475.NEW ASTRONOMY,15(1),155-158. |
| MLA | Yang, Y. -G.,et al."The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475".NEW ASTRONOMY 15.1(2010):155-158. |
入库方式： OAI收割
来源：国家天文台
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