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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.
Source PublicationNEW ASTRONOMY
2009-04
Volume14Issue:3Pages:249-253
DOI10.1016/j.newast.2008.08.009
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individuals: Ad Andromeda Stars: Multiple
AbstractNew 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.
Funding OrganizationChinese Academy of Sciences [08ZKY11001] ; Chinese Nature Science Foundation [10573032, 10433030] ; The National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2005A0059M]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1384-1076
URL查看原文
Archive Date2009-02-24
WOS IDWOS:000261990100005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD ; LIGHT CURVES
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5826
Collection双星与变星研究组
Corresponding AuthorLiao, WP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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