THE PHOTOMETRIC STUDY OF A NEGLECTED NEAR CONTACT BINARY: BS VULPECULAE
文献类型：期刊论文
| 作者 | Zhu LY(朱俐颖)1,2 ; Zejda, M3; Mikulasek, Z3,4; Liska, J3; Qian SB(钱声帮)1,2; de Villiers, SN5
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2012-08 |
| 卷号 | 144期号:2页码:37- |
| 关键词 | binaries: eclipsing stars: evolution stars: individual (BS Vul) |
| ISSN号 | 0004-6256 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Zhu, LY (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | We present a detailed study of the close eclipsing binary BS Vulpeculae. Although it is relatively bright (V: 10.9-11.6 mag) and belongs to short-periodic variable stars (P = 0.48 days), it is rather neglected. To perform a thorough period analysis, we collected all available photometric observations that span the time interval of 1898-2010. Observations include archive photographic plate measurements and visually determined eclipse minima timings done in 1979-2003, which were later shown to be biased to accommodate the existing linear ephemeris. Applying our own direct period analysis we found a well-defined shortening of the orbital period of dP/dt = -6.70(17) x 10(-11) = -2.11(6) ms yr(-1), which implies a continual mass flow from the primary to the secondary component. Using the 2003 version of the Wilson-Van Hamme code, our new complete BV(IR)(C) light curves were analyzed and the physical parameters of the system were derived. We found that BS Vul is a near contact binary system with the primary component filling its critical Roche lobe. The luminosity enhancement on the left shoulder of the secondary minimum shown in the light curves can be explained as a result of a persistent hot spot on the secondary due to the mass transfer from the primary component to the secondary one and heating the facing hemisphere of the secondary component, which is consistent with our result of period analysis. With the period decrease, BS Vul will evolve toward the contact phase. It is another good observational example as predicted by the theory of thermal relaxation oscillations. |
| 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] | STARS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/144/2/37/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000306596600008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5865]  |
| 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.National Astronomical Observatories/Yunnan Observatory, 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, P.O. Box 110, 650011 Kunming, China 3.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic 4.Observatory and Planetarium of J. Palisa, VŠB-Technical University, Ostrava, Czech Republic 5.Private Observatory, 61 Dick Burton Road, Plumstead, Cape Town, South Africa |
| 推荐引用方式 GB/T 7714 | Zhu LY,Zejda, M,Mikulasek, Z,et al. THE PHOTOMETRIC STUDY OF A NEGLECTED NEAR CONTACT BINARY: BS VULPECULAE[J]. ASTRONOMICAL JOURNAL,2012,144(2):37-. |
| APA | Zhu LY,Zejda, M,Mikulasek, Z,Liska, J,Qian SB,&de Villiers, SN.(2012).THE PHOTOMETRIC STUDY OF A NEGLECTED NEAR CONTACT BINARY: BS VULPECULAE.ASTRONOMICAL JOURNAL,144(2),37-. |
| MLA | Zhu LY,et al."THE PHOTOMETRIC STUDY OF A NEGLECTED NEAR CONTACT BINARY: BS VULPECULAE".ASTRONOMICAL JOURNAL 144.2(2012):37-. |
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来源：云南天文台
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