VZ Librae: A truly unsolved quadruple system containing double close binaries
文献类型：期刊论文
| 作者 | Qian SB(钱声帮) ; Liao WP(廖文萍)1,2; Liu L(刘亮)1,2; Yuan JZ(袁金照)1,2; He JJ(何家佳)1,2; Zhu LY(朱俐颖)1,2; Dai ZB(戴智斌)1,2; Zhang J(张嘉)1,2
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| 刊名 | NEW ASTRONOMY
 |
| 出版日期 | 2008-02 |
| 卷号 | 13期号:2页码:98-102 |
| 关键词 | stars : binaries : close stars : binaries : eclipsing stars : individuals : VZ librae stars : multiple |
| ISSN号 | 1384-1076 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | New orbital period and period variation of the W UMa-type eclipsing binary, VZ Librae, are presented. It is discovered that the orbital period of VZ Librae shows a periodic change with an amplitude of 0.0200 d and a period of 17.1 year. The cyclic period change can be explained as the light travel-time orbit of a tertiary component in the system. This is consistent with the spectroscopic results by Lu et al. [Lu, W.-X., Rucinski, S.M., Ogloza, W., 2001. AJ 122, 402] who found a faint spectroscopic companion in the system (VZ Librae B) that may be a close binary. Based on the light travel-time analysis, it is shown that the mass of the tertiary component is no less than 1.07M circle dot, which is much larger than that (M-3 similar to 0.67M circle dot) estimated by D'Angelo et al. [D'Angelo, C., van Kerkwijk, M.H., Rucinski, S.M., 2006. AJ 132, 650]. This finding, in combination with its low luminosity, indicates that the spectroscopic companion is a close binary star suggesting that VZ Librae is an unsolved quadruple system containing double close binary stars in a separation less than 7.2 AU. As in the case of V899 Herculis, it is a good astrophysical laboratory to study the formation and evolution of overcontact binaries and multiple systems. (C) 2007 Elsevier B.V. All rights reserved. |
| 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] | ORBITAL PERIOD MODULATION ; CONTACT BINARIES ; PHYSICAL PARAMETERS ; ECLIPSING BINARIES ; STARS ; COMPONENTS ; EVOLUTION ; ORIGIN |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107607000759 |
| 语种 | 英语 |
| WOS记录号 | WOS:000250774100006 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5813]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, PR China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, PR China |
| 推荐引用方式 GB/T 7714 | Qian SB,Liao WP,Liu L,et al. VZ Librae: A truly unsolved quadruple system containing double close binaries[J]. NEW ASTRONOMY,2008,13(2):98-102. |
| APA | Qian SB.,Liao WP.,Liu L.,Yuan JZ.,He JJ.,...&Zhang J.(2008).VZ Librae: A truly unsolved quadruple system containing double close binaries.NEW ASTRONOMY,13(2),98-102. |
| MLA | Qian SB,et al."VZ Librae: A truly unsolved quadruple system containing double close binaries".NEW ASTRONOMY 13.2(2008):98-102. |
入库方式： OAI收割
来源：云南天文台
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