Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. Two-component models

	Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. Two-component models
	Hong, Jongsuk 1; Kim, Eunhyeuk 2; Lee, Hyung Mok 1,3; Spurzem, Rainer4,5,6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013-04-01
卷号	430 期号:4 页码:2960-2972
关键词	methods: numerical methods: statistical globular clusters: general
英文摘要	To understand the effects of the initial rotation on the evolution of the tidally limited clusters with mass spectrum, we have performed N-body simulations of the clusters with different initial rotations and compared the results with those of the Fokker-Planck (FP) simulations. We confirmed that the cluster evolution is accelerated by not only the initial rotation but also the mass spectrum. For the slowly rotating models, the time evolutions of mass, energy and angular momentum show good agreements between N-body and FP simulations. On the other hand, for the rapidly rotating models, there are significant differences between these two approaches at the early stage of the evolutions because of the development of bar instability in N-body simulations. The shape of the cluster for N-body simulations becomes tri-axial or even prolate, which cannot be produced by the two-dimensional FP simulations. The total angular momentum and the total mass of the cluster decrease rapidly while bar-like structure persists. After the rotational energy becomes smaller than the critical value for the bar instability, the shape of the cluster becomes nearly axisymmetric again, and follows the evolutionary track predicted by the FP equation. We have confirmed again that the energy equipartition is not completely achieved when M-2/M-1(m(2)/m(1))(3/2) > 0.16. By examining the angular momentum at each mass component, we found that the exchange of angular momentum between different mass components occurs, similar to the energy exchange leading to the equipartition.
收录类别	SCI
语种	英语
WOS记录号	WOS:000318339700039
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6021]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul 151742, South Korea 2.Korea Aerosp Res Inst, Taejon 305806, South Korea 3.Seoul Natl Univ, Ctr Theoret Phys, Seoul 151742, South Korea 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Zentrum Astron Univ Heidelberg ZAH, Astron Rechen Inst, D-69120 Heidelberg, Germany 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Hong, Jongsuk,Kim, Eunhyeuk,Lee, Hyung Mok,et al. Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. Two-component models[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,430(4):2960-2972.
APA	Hong, Jongsuk,Kim, Eunhyeuk,Lee, Hyung Mok,&Spurzem, Rainer.(2013).Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. Two-component models.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,430(4),2960-2972.
MLA	Hong, Jongsuk,et al."Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. Two-component models".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430.4(2013):2960-2972.