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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.
Million-body star cluster simulations: comparisons between Monte Carlo and direct N-body
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
KeywordGravitationalwaves Methods: Numerical Binaries: Close Stars: Kinematics And Dynamics Globular Clusters: General
AbstractWe 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.
2016
Volume463Issue:2Pages:2109-2118
Subject AreaAstronomy & Astrophysics
DOIhttp://dx.doi.org/10.1093/mnras/stw2121
Indexed BySCI
Funding OrganizationNSF [AST-1312945, GK-12, DGE-0948017] ; NSF [AST-1312945, GK-12, DGE-0948017] ; NSF [AST-1312945, GK-12, DGE-0948017] ; NSF [AST-1312945, GK-12, DGE-0948017] ; NASA [NNX14AP92G] ; NASA [NNX14AP92G] ; NASA [NNX14AP92G] ; NASA [NNX14AP92G] ; NSF GRFP Fellowship [DGE-0824162] ; NSF GRFP Fellowship [DGE-0824162] ; NSF GRFP Fellowship [DGE-0824162] ; NSF GRFP Fellowship [DGE-0824162] ; Qianren (Thousand Talents) special foreign experts program of China through the Silk Road Project at the National Astronomical Observatories of China (NAOC) ; Qianren (Thousand Talents) special foreign experts program of China through the Silk Road Project at the National Astronomical Observatories of China (NAOC) ; Qianren (Thousand Talents) special foreign experts program of China through the Silk Road Project at the National Astronomical Observatories of China (NAOC) ; Qianren (Thousand Talents) special foreign experts program of China through the Silk Road Project at the National Astronomical Observatories of China (NAOC) ; Strategic Priority Research Program 'The Emergence of Cosmological Structures' of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program 'The Emergence of Cosmological Structures' of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program 'The Emergence of Cosmological Structures' of the Chinese Academy of Sciences [XDB09000000] ; Strategic Priority Research Program 'The Emergence of Cosmological Structures' of the Chinese Academy of Sciences [XDB09000000] ; Max-Planck-Institute for Astrophysics (MPA) in Garching, Germany ; Max-Planck-Institute for Astrophysics (MPA) in Garching, Germany ; Max-Planck-Institute for Astrophysics (MPA) in Garching, Germany ; Max-Planck-Institute for Astrophysics (MPA) in Garching, Germany ; Nicolaus Copernicus Astronomical Center (CAMK) in Warsaw, Poland ; Nicolaus Copernicus Astronomical Center (CAMK) in Warsaw, Poland ; Nicolaus Copernicus Astronomical Center (CAMK) in Warsaw, Poland ; Nicolaus Copernicus Astronomical Center (CAMK) in Warsaw, Poland
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21473
Collection理论物理所科研产出_SCI论文
Corresponding AuthorRodriguez, CL (reprint author), Northwestern Univ, CIERA, Evanston, IL 60208 USA.; Rodriguez, CL (reprint author), Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
Recommended Citation
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.
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