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VZ Librae: A truly unsolved quadruple system containing double close binaries
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; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2008-02
卷号13期号:2页码:98-102
DOI10.1016/j.newast.2007.07.003
产权排序第1完成单位
收录类别SCI
关键词Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individuals : Vz Librae Stars : Multiple
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2008-01-08
WOS记录号WOS:000250774100006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; CONTACT BINARIES ; PHYSICAL PARAMETERS ; ECLIPSING BINARIES ; STARS ; COMPONENTS ; EVOLUTION ; ORIGIN
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5813
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
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
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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.,...&Qian, SB .(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.
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