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Detection of a tertiary companion in the eclipsing binary AD Andromeda
Liao WP(廖文萍)1,2,3; Qian SB(钱声帮)1,2,3; Liao, WP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2009-04
卷号14期号:3页码:249-253
DOI10.1016/j.newast.2008.08.009
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: Ad Andromeda Stars: Multiple
摘要New orbital period variation of the eclipsing binary, AD Andromeda, was analyzed based on one CCD photometric times of minimum we have obtained and all available photoelectric and CCD values collected from the literatures. It is discovered that the orbital period of the binary shows a periodic oscillation with a period of 14.38 years and an amplitude of 0.0186 days. The periodic oscillation can be explained by the light-time effect via the presence of a tertiary component in a nearly circular orbit with a small eccentricity of e = 0.30 in the system. Based on the present analysis, it is estimated that the mass of the third body is no less than 1.76(+/- 0.08) M., and it should contribute light to the total system. Meanwhile, the photoelectric light curve obtained in yellow light by Rucinski [Rucinski, S.M., 1966. AcA 16, 307] was reanalyzed with the 2003 version of the W-D code. The results show that AD Andromeda is a detached eclipsing binary, and photometric solutions were computed. Based on the analysis, we obtained a small amount of third light in the system (L(3V) similar to 0.001), which is too small for the contribution of the tertiary companion star. The low luminosity of the third companion may be explained in two possible ways, either: (1) the third companion might itself be a close double star consisting of two stars of 0.88 solar masses, or (2) it is a dark star such as a neutron star. We think the first possibility is a more likely one than a neutron star companion. New photometric and spectroscopic observations and a detailed investigation of those data are urgently required in the future. (C) 2008 Elsevier B.V. All rights reserved.
项目资助者Chinese Academy of Sciences [08ZKY11001] ; Chinese Nature Science Foundation [10573032, 10433030] ; The National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2005A0059M]
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2009-02-24
WOS记录号WOS:000261990100005
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD ; LIGHT CURVES
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被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5826
专题双星与变星研究组
通讯作者Liao, WP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan 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
3.Graduate School of the CAS, Beijing, PR China
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GB/T 7714
Liao WP,Qian SB,Liao, WP . Detection of a tertiary companion in the eclipsing binary AD Andromeda[J]. NEW ASTRONOMY,2009,14(3):249-253.
APA Liao WP,Qian SB,&Liao, WP .(2009).Detection of a tertiary companion in the eclipsing binary AD Andromeda.NEW ASTRONOMY,14(3),249-253.
MLA Liao WP,et al."Detection of a tertiary companion in the eclipsing binary AD Andromeda".NEW ASTRONOMY 14.3(2009):249-253.
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