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First period investigation of detached binary star AM Tau
Wang ZH(王志华)1,2,3; Zhu LY(朱俐颖)1,2,3
Source PublicationNEW ASTRONOMY
2016-11-01
Volume49Pages:13-16
DOI10.1016/j.newast.2016.05.003
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Close Stars: Binaries: Eclipsing Stars: Individual (Am Tau)
Abstract

AM Tau is a detached eclipsing binary with the secondary component more evolved than the primary one. The period changes of this neglected eclipsing binary are analyzed based on four times of primary minimum obtained between 2007 and 2016 together with those collected from the literature. It is detected that the general trend of the O-C curve shows a downward parabolic variation, which reveals a continuous period decrease at a rate of dP/dt = -9.0 x 10(-7)(+/- 0.2) d yr(-1), meanwhile, the system undergoes two cyclic oscillations with periods of 24.1 and 8.8 years. The continuous decrease in the orbital period may be caused by angular momentum loss (AML) via an enhanced stellar wind of the evolved secondary star. The two cyclic variations in the O-C diagram are interpreted by the light travel-time effect via the presence of two additional stellar companions with masses estimated as M(3)sin i(3) similar to 1.36M(circle dot) and M(4)sin i(4) similar to 0.33M(circle dot). Their orbital separations are about 14 and 8 AU, respectively, and the orbital periods are almost in 3 : 1 resonance orbits. (C) 2016 Elsevier B.V. All rights reserved.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11573063] ; Key Research Program of the Chinese Academy of Sciences[KGZD-EW-603] ; Science Foundation of Yunnan Province[2013FB084] ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences[XDB09010202]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315, 11573063] ; Key Research Program of the Chinese Academy of Sciences[KGZD-EW-603] ; Science Foundation of Yunnan Province[2013FB084] ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences[XDB09010202]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2016-10-11
WOS IDWOS:000380630000003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordANGULAR-MOMENTUM LOSS ; ALGOL-TYPE BINARIES ; POSSIBLE MASS ; OVERCONTACT BINARY ; PERSEI ; GEMINORUM ; COMPANION ; DELPHINI ; VIRGINIS ; WIND
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9622
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorWang ZH(王志华)
Affiliation1.First period investigation of detached binary star AM Tau
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
Recommended Citation
GB/T 7714
Wang ZH,Zhu LY. First period investigation of detached binary star AM Tau[J]. NEW ASTRONOMY,2016,49:13-16.
APA Wang ZH,&Zhu LY.(2016).First period investigation of detached binary star AM Tau.NEW ASTRONOMY,49,13-16.
MLA Wang ZH,et al."First period investigation of detached binary star AM Tau".NEW ASTRONOMY 49(2016):13-16.
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