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题名: THE DYNAMICAL STATE AND LONG-TERM STABILITY OF HIP 102589
作者: Xia Fang(夏芳)1; Fu YanNing(傅燕宁)1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-11-20
卷号: 814, 期号:1, 页码:64-69
关键词: binaries: close ; methods: data analysis ; stars: fundamental parameters ; stars: individual (HIP 102589) ; stars: kinematics and dynamics
学科分类: 天体力学
DOI: 10.1088/0004-637X/814/1/64
文章类型: Article
英文摘要: The dynamical state (component masses and kinematic parameters) of the triple star HIP 102589 is redetermined by fitting the simple double two-body model and the accurate three-body model, respectively, to observational data including those accumulated since the last orbit determination in 1992. Though the precision-weighted sum of squared residuals calculated from our results with both models are significantly smaller than the previous ones, only the result with the three-body model is statistically acceptable according to the goodness-of-fit test. The forward and backward long-term dynamical evolutions are numerically explored on the timescale of an estimated age of the components. It is found that the three-body system remains integrated and its hierarchical configuration keeps unchanged since the formation of the components, despite the fact that the instantaneous double two-body orbits vary significantly. This implies that the triple star may not be formed by a three-body encounter. Also, the possibility that the most massive component is itself a tightly bounded binary is discussed based on the redetermined mass and a stellar empirical mass-luminosity relation.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: MULTIPLE STARS ; BINARY STARS ; CD-ROM ; SPECKLE INTERFEROMETRY ; WEAK HIERARCHY ; CATALOG ; ORBITS
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11178006 ; 11203086)
语种: 英语
WOS记录号: WOS:000365310200064
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15198
Appears in Collections:历算和天文参考系研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
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