RAPID DYNAMICAL MASS SEGREGATION AND PROPERTIES OF FRACTAL STAR CLUSTERS

	RAPID DYNAMICAL MASS SEGREGATION AND PROPERTIES OF FRACTAL STAR CLUSTERS
	Yu, Jincheng 1,2; de Grijs, Richard 2,3; Chen, Li1
刊名	ASTROPHYSICAL JOURNAL
	2011-05-01
卷号	732 期号:1 页码:1
关键词	methods: numerical open clusters and associations: general stars: kinematics and dynamics
英文摘要	We investigate the evolution of young star clusters using N-body simulations. We confirm that subvirial and fractal-structured clusters will dynamically mass segregate on a short timescale (within 0.5Myr). We adopt a modified minimum-spanning-tree method to measure the degree of mass segregation, demonstrating that the stars escaping from a cluster's potential are important for the temporal dependence of mass segregation in the cluster. The form of the initial velocity distribution will also affect the degree of mass segregation. If it depends on radius, the outer parts of the cluster would expand without undergoing collapse. In velocity space, we find "inverse mass segregation," which indicates that massive stars have higher velocity dispersions than their lower-mass counterparts.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	EMBEDDED CLUSTERS ; MOLECULAR CLOUDS ; EVOLUTION ; SERPENS ; SYSTEMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000289626500016
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/26417]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yu, Jincheng,de Grijs, Richard,Chen, Li. RAPID DYNAMICAL MASS SEGREGATION AND PROPERTIES OF FRACTAL STAR CLUSTERS[J]. ASTROPHYSICAL JOURNAL,2011,732(1):1.
APA	Yu, Jincheng,de Grijs, Richard,&Chen, Li.(2011).RAPID DYNAMICAL MASS SEGREGATION AND PROPERTIES OF FRACTAL STAR CLUSTERS.ASTROPHYSICAL JOURNAL,732(1),1.
MLA	Yu, Jincheng,et al."RAPID DYNAMICAL MASS SEGREGATION AND PROPERTIES OF FRACTAL STAR CLUSTERS".ASTROPHYSICAL JOURNAL 732.1(2011):1.