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

	Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body
	Rodriguez, Carl L.1,2; Morscher, Meagan 1,2; Wang, Long 3,4; Chatterjee, Sourav 1,2; Rasio, Frederic A.1,2; Spurzem, Rainer4,5,6,7,8
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-12-01
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
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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MASS BLACK-HOLES ; GLOBULAR-CLUSTER ; STELLAR EVOLUTION ; DYNAMICAL EVOLUTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000388122400076
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6849]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Northwestern Univ, CIERA, Evanston, IL 60208 USA 2.Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA 3.RIKEN Adv Inst Computat Sci, Chuo Ku, 7-1-26 Minatojima Minami Machi, Kobe, Hyogo 6500047, Japan 4.Peking Univ, Kavli Inst Astron & Astrophys, Yiheyuan Lu 5, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 6.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 7.Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China 8.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany
推荐引用方式 GB/T 7714	Rodriguez, Carl L.,Morscher, Meagan,Wang, Long,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, Carl L.,Morscher, Meagan,Wang, Long,Chatterjee, Sourav,Rasio, Frederic A.,&Spurzem, Rainer.(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, Carl L.,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.