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THE DYNAMICAL STATE AND LONG-TERM STABILITY OF HIP 102589
Xia, Fang; Fu, Yanning
2015-11-20
Source PublicationASTROPHYSICAL JOURNAL
Volume814Issue:1Pages:64-69
AbstractThe 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.
KeywordBinaries: Close Methods: Data Analysis Stars: Fundamental Parameters Stars: Individual (Hip 102589) Stars: Kinematics And Dynamics
Subject Area天体力学
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/814/1/64
WOS KeywordMULTIPLE STARS ; BINARY STARS ; CD-ROM ; SPECKLE INTERFEROMETRY ; WEAK HIERARCHY ; CATALOG ; ORBITS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000365310200064
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15198
Collection历算和天文参考系研究团组
AffiliationChinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Xia, Fang,Fu, Yanning. THE DYNAMICAL STATE AND LONG-TERM STABILITY OF HIP 102589[J]. ASTROPHYSICAL JOURNAL,2015,814(1):64-69.
APA Xia, Fang,&Fu, Yanning.(2015).THE DYNAMICAL STATE AND LONG-TERM STABILITY OF HIP 102589.ASTROPHYSICAL JOURNAL,814(1),64-69.
MLA Xia, Fang,et al."THE DYNAMICAL STATE AND LONG-TERM STABILITY OF HIP 102589".ASTROPHYSICAL JOURNAL 814.1(2015):64-69.
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