On Period Variations of the K-Type Eclipsing Binary BM Ursae Majoris
文献类型：期刊论文
| 作者 | Yang, Yuan-Gui1,2; Wei, J. -Y.2; Nakajima, Kazuhiro3 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2009 |
| 卷号 | 61期号:1页码:13-18 |
| 关键词 | stars: binaries: close stars: binaries: eclipsing stars: individual (BM Urase Majoris) |
| 英文摘要 | From new CCD observations, 11 light minimum times are presented in this paper. The orbital period change of a W UMa-type eclipsing binary, BM Urase Majoris, was investigated, based on all available times of light minimum. It was discovered that the orbital period of the binary shows cyclic oscillation, superimposed on a secular period decrease. The amplitude and the period of the cyclic variation are A = 0.0101(+/-0.0004)d and P(3) = 30.8(+/-0.2) yr, respectively. This kind of cyclic variation may be due to a light-time effect via an unseen third body. If the existence of an additional body is true, it may remove a great amount of angular momentum from the central system, and may play an important role in the formation of close binary. The orbital period continuously decreases at a rate of dP/dt = -7.49(+/-0.16) x 10(-8) d yr(-1), which may be due to mass transfer from the primary to the secondary, accompanying mass and angular-momentum loss from the binary system. The orbital period decrease, accompanying mass and angular momentum loss, would cause the contact degree to increase. Therefore, this binary will evolve into a deep contact configuration. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000264417900002 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7535]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Huaibei Coal Ind Teachers Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.VSOLJ, Kumano, Mie 5194673, Japan |
| 推荐引用方式 GB/T 7714 | Yang, Yuan-Gui,Wei, J. -Y.,Nakajima, Kazuhiro. On Period Variations of the K-Type Eclipsing Binary BM Ursae Majoris[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2009,61(1):13-18. |
| APA | Yang, Yuan-Gui,Wei, J. -Y.,&Nakajima, Kazuhiro.(2009).On Period Variations of the K-Type Eclipsing Binary BM Ursae Majoris.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,61(1),13-18. |
| MLA | Yang, Yuan-Gui,et al."On Period Variations of the K-Type Eclipsing Binary BM Ursae Majoris".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61.1(2009):13-18. |
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来源：国家天文台
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