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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; Wang, ZH
发表期刊NEW ASTRONOMY
2016-11-01
卷号49页码:13-16
DOI10.1016/j.newast.2016.05.003
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: Individual (Am Tau)
摘要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.
项目资助者Chinese 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)
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2016-10-11
WOS记录号WOS:000380630000003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ANGULAR-MOMENTUM LOSS ; ALGOL-TYPE BINARIES ; POSSIBLE MASS ; OVERCONTACT BINARY ; PERSEI ; GEMINORUM ; COMPANION ; DELPHINI ; VIRGINIS ; WIND
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9622
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Wang, ZH
作者单位1.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
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GB/T 7714
Wang ZH,Zhu LY,Wang, ZH. First period investigation of detached binary star AM Tau[J]. NEW ASTRONOMY,2016,49:13-16.
APA Wang ZH,Zhu LY,&Wang, ZH.(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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