Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code 'rVINE'

	Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code 'rVINE'
	Karl, Simon J.1,2; Aarseth, Sverre J.1; Naab, Thorsten 3; Haehnelt, Martin G.1,2; Spurzem, Rainer4,5,6
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2015-09-21
卷号	452 期号:3 页码:2337-2352
关键词	black hole physics methods: numerical stars: kinematics and dynamics galaxies: evolution galaxies: nuclei
英文摘要	We present a hybrid code combining the OpenMP-parallel tree code VINE with an algorithmic chain regularization scheme. The new code, called 'rVINE', aims to significantly improve the accuracy of close encounters of massive bodies with supermassive black holes (SMBHs) in galaxy-scale numerical simulations. We demonstrate the capabilities of the code by studying two test problems, the sinking of a single massive black hole to the centre of a gas-free galaxy due to dynamical friction and the hardening of an SMBH binary due to close stellar encounters. We show that results obtained with rVINE compare well with NBODY7 for problems with particle numbers that can be simulated with NBODY7. In particular, in both NBODY7 and rVINE we find a clear N-dependence of the binary hardening rate, a low binary eccentricity and moderate eccentricity evolution, as well as the conversion of the galaxy's inner density profile from a cusp to a core via the ejection of stars at high velocity. The much larger number of particles that can be handled by rVINE will open up exciting opportunities to model stellar dynamics close to SMBHs much more accurately in a realistic galactic context. This will help to remedy the inherent limitations of commonly used tree solvers to follow the correct dynamical evolution of black holes in galaxy-scale simulations.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360854200009
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5591]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England 2.Kavli Inst Cosmol, Cambridge CB3 0HA, England 3.Max Planck Inst Astrophys, D-85741 Garching, Germany 4.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 5.Heidelberg Univ, Zentrum Astron, Astron Rech Inst, D-69120 Heidelberg, Germany 6.Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Karl, Simon J.,Aarseth, Sverre J.,Naab, Thorsten,et al. Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code 'rVINE'[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(3):2337-2352.
APA	Karl, Simon J.,Aarseth, Sverre J.,Naab, Thorsten,Haehnelt, Martin G.,&Spurzem, Rainer.(2015).Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code 'rVINE'.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(3),2337-2352.
MLA	Karl, Simon J.,et al."Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code 'rVINE'".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.3(2015):2337-2352.