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THE EFFECT OF WARM DARK MATTER ON GALAXY PROPERTIES: CONSTRAINTS FROM THE STELLAR MASS FUNCTION AND THE TULLY-FISHER RELATION
Kang, Xi1; Maccio, Andrea V.2; Dutton, Aaron A.2
2013-04-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume767Issue:1Pages:8PP
Corresponding AuthorKang, X (reprint author), Acad Sinica, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Peoples R China. Email: 0
AbstractIn this paper, we combine high-resolution N-body simulations with a semi-analytical model of galaxy formation to study the effects of a possible warm dark matter (WDM) component on the observable properties of galaxies. We compare three WDM models with a dark matter (DM) mass of 0.5, 0.75, and 2.0 keV with the standard cold dark matter case. For a fixed set of parameters describing the baryonic physics, the WDM models predict fewer galaxies at low (stellar) masses, as expected due to the suppression of power on small scales, while no substantial difference is found at the high-mass end. However, these differences in the stellar mass function vanish when a different set of parameters is used to describe the (largely unknown) galaxy formation processes. We show that it is possible to break this degeneracy between DM properties and the parameterization of baryonic physics by combining observations on the stellar mass function with the Tully-Fisher relation (the relation between stellar mass and the rotation velocity at large galactic radii as probed by resolved H I rotation curves). WDM models with a too warm candidate (m(nu) < 0.75 keV) cannot simultaneously reproduce the stellar mass function and the Tully-Fisher relation. We conclude that accurate measurements of the galaxy stellar mass function and the link between galaxies and DM halos down to the very low mass end can give very tight constraints on the nature of DM candidates.
KeywordCosmology: Theory Dark Matter Galaxies: Formation Galaxies: Luminosity Function, Mass Function Large-scale Structure Of Universe Methods: Analytical
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/767/1/22
WOS KeywordMILKY-WAY SATELLITES ; HALO MASSES ; LAMBDA-CDM ; SEMIANALYTICAL MODEL ; GALACTIC SATELLITES ; LUMINOSITY FUNCTION ; POWER SPECTRUM ; SIMULATIONS ; EVOLUTION ; UNIVERSE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000316947500022
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9892
Collection星系宇宙学和暗能量研究团组
Affiliation1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Max Planck Inst Astron, D-69117 Heidelberg, Germany
Recommended Citation
GB/T 7714
Kang, Xi,Maccio, Andrea V.,Dutton, Aaron A.. THE EFFECT OF WARM DARK MATTER ON GALAXY PROPERTIES: CONSTRAINTS FROM THE STELLAR MASS FUNCTION AND THE TULLY-FISHER RELATION[J]. ASTROPHYSICAL JOURNAL,2013,767(1):8PP.
APA Kang, Xi,Maccio, Andrea V.,&Dutton, Aaron A..(2013).THE EFFECT OF WARM DARK MATTER ON GALAXY PROPERTIES: CONSTRAINTS FROM THE STELLAR MASS FUNCTION AND THE TULLY-FISHER RELATION.ASTROPHYSICAL JOURNAL,767(1),8PP.
MLA Kang, Xi,et al."THE EFFECT OF WARM DARK MATTER ON GALAXY PROPERTIES: CONSTRAINTS FROM THE STELLAR MASS FUNCTION AND THE TULLY-FISHER RELATION".ASTROPHYSICAL JOURNAL 767.1(2013):8PP.
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