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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
2011-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume410Issue:4Pages:2309-2314
AbstractWe 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.
KeywordMethods: Numerical Galaxies: Haloes Dark Matter
DOI10.1111/j.1365-2966.2010.17601.x
Indexed BySCI
Language英语
WOS IDWOS:000286211000017
Citation statistics
Cited Times:51[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7967
Collection星系宇宙学研究部
Affiliation1.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
Recommended Citation
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.
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