The statistics of the subhalo abundance of dark matter haloes

	The statistics of the subhalo abundance of dark matter haloes
	Gao, L.1,2 ; Frenk, C. S.2; Boylan-Kolchin, M.3; Jenkins, A.2; Springel, V.3,4; White, S. D. M.3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2011-02-01
卷号	410 期号:4 页码:2309-2314
关键词	methods: numerical galaxies: haloes dark matter
英文摘要	We study the population statistics of the surviving subhaloes of Lambda CDM dark matter haloes using a set of very high resolution N-body simulations. These include both simulations of representative regions of the Universe and ultra-high resolution resimulations of individual dark matter haloes. We find that more massive haloes tend to have a larger mass fraction in subhaloes. For example, cluster size haloes typically have 7.5 per cent of the mass within R-200 in substructures of fractional mass larger than 10(-5), which is 25 per cent higher than galactic haloes. There is, however, a large variance in the subhalo mass fraction from halo to halo, whereas the subhalo abundance shows much higher regularity. For dark matter haloes of fixed mass, the subhalo abundance decreases by 30 per cent between redshift 2 and 0. The subhalo abundance function correlates with the host halo concentration parameter and formation redshift. However, the intrinsic scatter is not significantly reduced for narrow ranges of concentration parameter or formation redshift, showing that they are not the dominant parameters that determine the subhalo abundance in a halo.
收录类别	SCI
语种	英语
WOS记录号	WOS:000286211000017
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7967]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Durham, Sci Labs, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England 3.Max Planck Inst Astrophys, D-85748 Garching, Germany 4.Heidelberg Inst Theoret Studies, D-69118 Heidelberg, Germany
推荐引用方式 GB/T 7714	Gao, L.,Frenk, C. S.,Boylan-Kolchin, M.,et al. The statistics of the subhalo abundance of dark matter haloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,410(4):2309-2314.
APA	Gao, L.,Frenk, C. S.,Boylan-Kolchin, M.,Jenkins, A.,Springel, V.,&White, S. D. M..(2011).The statistics of the subhalo abundance of dark matter haloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,410(4),2309-2314.
MLA	Gao, L.,et al."The statistics of the subhalo abundance of dark matter haloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 410.4(2011):2309-2314.