PMO OpenIR  > 分子云与恒星形成研究团组
The mass profile and accretion history of cold dark matter haloes
Ludlow, Aaron D.1; Navarro, Julio F.2; Boylan-Kolchin, Michael3; Bett, Philip E.1; Angulo, Raul E.4; Li, Ming5,6; White, Simon D. M.5; Frenk, Carlos7; Springel, Volker8,9
2013-06-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume432Issue:2Pages:1103-1113
Corresponding AuthorLudlow, AD (reprint author), Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany. Email: aludlow@astro.uni-bonn.de
AbstractWe use the Millennium Simulation series to investigate the relation between the accretion history and mass profile of cold dark matter (CDM) haloes. We find that the mean inner density within the scale radius, r(-2) (where the halo density profile has isothermal slope), is directly proportional to the critical density of the Universe at the time when the virial mass of the main progenitor equals the mass enclosed within r(-2). Scaled to these characteristic values of mass and density, the average mass accretion history, expressed in terms of the critical density of the Universe, M((crit)(z)), resembles that of the enclosed density profile, M(<<>>), at z = 0. Both follow closely the Navarro, Frenk & White (NFW) profile, which suggests that the similarity of halo mass profiles originates from the mass-independence of halo accretion histories. Support for this interpretation is provided by outlier haloes whose accretion histories deviate from the NFW shape; their mass profiles show correlated deviations from NFW and are better approximated by Einasto profiles. Fitting both M(<<>>) and M((crit)) with either NFW or Einasto profiles yield concentration and shape parameters that are correlated, confirming and extending earlier work that has linked the concentration of a halo with its accretion history. These correlations also confirm that halo structure is insensitive to initial conditions: only haloes whose accretion histories differ greatly from the NFW shape show notable deviations from NFW in their mass profiles. As a result, the NFW profile provides acceptable fits to hot dark matter haloes, which do not form hierarchically, and for fluctuation power spectra other than CDM. Our findings, however, predict a subtle but systematic dependence of mass profile shape on accretion history which, if confirmed, would provide strong support for the link between accretion history and halo structure we propose here.
KeywordMethods: Numerical Dark Matter
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stt526
WOS KeywordUNIVERSAL DENSITY PROFILE ; GRAVITATIONAL COLLAPSE ; REDSHIFT DEPENDENCE ; ASSEMBLY HISTORIES ; COSMIC STRUCTURE ; GALAXY CLUSTERS ; INNER STRUCTURE ; EVOLUTION ; SIMULATION ; MODELS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000319832300017
Citation statistics
Cited Times:96[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9838
Collection分子云与恒星形成研究团组
Affiliation1.Argelander Inst Astron, D-53121 Bonn, Germany
2.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V8P 5C2, Canada
3.Univ Calif Irvine, Ctr Galaxy Evolut, Irvine, CA 92697 USA
4.Stanford Univ, SLAC Natl Lab, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA
5.Max Planck Inst Astrophys, D-85740 Garching, Germany
6.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
7.Univ Durham, Inst Computat Cosmol, Dept Phys, Durham DH1 3LE, England
8.Heidelberg Inst Theoret Studies, D-69118 Heidelberg, Germany
9.Heidelberg Univ, ARI, Zentrum Astron, D-69120 Heidelberg, Germany
Recommended Citation
GB/T 7714
Ludlow, Aaron D.,Navarro, Julio F.,Boylan-Kolchin, Michael,et al. The mass profile and accretion history of cold dark matter haloes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,432(2):1103-1113.
APA Ludlow, Aaron D..,Navarro, Julio F..,Boylan-Kolchin, Michael.,Bett, Philip E..,Angulo, Raul E..,...&Springel, Volker.(2013).The mass profile and accretion history of cold dark matter haloes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,432(2),1103-1113.
MLA Ludlow, Aaron D.,et al."The mass profile and accretion history of cold dark matter haloes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 432.2(2013):1103-1113.
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