Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body

doi:http://dx.doi.org/10.1093/mnras/stw2121

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	Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body
	Rodriguez, CL; Morscher, M; Wang, L; Chatterjee, S; Rasio, FA; Spurzem, R; Rodriguez, CL (reprint author), Northwestern Univ, CIERA, Evanston, IL 60208 USA.; Rodriguez, CL (reprint author), Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016
卷号	463 期号:2 页码:2109-2118
关键词	Gravitationalwaves Methods: Numerical Binaries: Close Stars: Kinematics And Dynamics Globular Clusters: General
DOI	http://dx.doi.org/10.1093/mnras/stw2121
英文摘要	We present the first detailed comparison between million-body globular cluster simulations computed with a Henon-type Monte Carlo code, CMC, and a direct N-body code, NBODY6++GPU. Both simulations start from an identical cluster model with 106 particles, and include all of the relevant physics needed to treat the system in a highly realistic way. With the two codes 'frozen' (no fine-tuning of any free parameters or internal algorithms of the codes) we find good agreement in the overall evolution of the two models. Furthermore, we find that in both models, large numbers of stellar-mass black holes (> 1000) are retained for 12 Gyr. Thus, the very accurate direct N-body approach confirms recent predictions that black holes can be retained in present-day, old globular clusters. We find only minor disagreements between the two models and attribute these to the small-N dynamics driving the evolution of the cluster core for which the Monte Carlo assumptions are less ideal. Based on the overwhelming general agreement between the two models computed using these vastly different techniques, we conclude that our Monte Carlo approach, which is more approximate, but dramatically faster compared to the direct N-body, is capable of producing an accurate description of the long-term evolution of massive globular clusters even when the clusters contain large populations of stellar-mass black holes.
学科主题	Astronomy & Astrophysics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21473]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Rodriguez, CL (reprint author), Northwestern Univ, CIERA, Evanston, IL 60208 USA.; Rodriguez, CL (reprint author), Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
推荐引用方式 GB/T 7714	Rodriguez, CL,Morscher, M,Wang, L,et al. Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(2):2109-2118.
APA	Rodriguez, CL.,Morscher, M.,Wang, L.,Chatterjee, S.,Rasio, FA.,...&Rodriguez, CL .(2016).Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(2),2109-2118.
MLA	Rodriguez, CL,et al."Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.2(2016):2109-2118.