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Semi-analytic model predictions of mass segregation from groups to clusters
Contini, E.; Kang, X.
2015-10-11
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume453Issue:1Pages:L53-L57
AbstractTaking advantage of a high-resolution simulation coupled with a state-of-art semi-analytic model of galaxy formation, we probe the mass segregation of galaxies in groups and clusters, focusing on which physical mechanisms are driving it. We find evidence of mass segregation in groups and clusters up to the virial radius, both looking at the galaxy stellar mass and subhalo mass. The physical mechanism responsible for that is consistent with dynamical friction, a drag-force that brings more massive galaxies faster towards the innermost regions of the halo. At odds with observational results, we do not find the inclusion of low-mass galaxies in the samples, down to stellar mass M-* = 10(9) M-aS (TM), to change the overall trend shown by intermediate and massive galaxies. Moreover, stellar stripping as well as the growth of galaxies after their accretion, do not contribute either in shaping mass segregation or mixing the radial mass distribution. Beyond the virial radius we find an 'antimass segregation' in groups that progressively weakens in clusters. The continuous accretion of new objects and recent merger events play a different role depending on the halo mass on to which accreting material is falling.
KeywordGalaxy: Formation Galaxies: Evolution
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnrasl/slv103
WOS KeywordDARK-MATTER HALOES ; DIGITAL SKY SURVEY ; GALAXY FORMATION MODELS ; STAR-FORMATION ; ENVIRONMENTAL DEPENDENCE ; COSMOLOGICAL SIMULATIONS ; INTRACLUSTER LIGHT ; DISC GALAXIES ; STELLAR MASS ; RESOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000361300300012
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14858
Collection星系宇宙学和暗能量研究团组
AffiliationMPI Astron, Purple Mt Observ, Partner Grp, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Contini, E.,Kang, X.. Semi-analytic model predictions of mass segregation from groups to clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,453(1):L53-L57.
APA Contini, E.,&Kang, X..(2015).Semi-analytic model predictions of mass segregation from groups to clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,453(1),L53-L57.
MLA Contini, E.,et al."Semi-analytic model predictions of mass segregation from groups to clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 453.1(2015):L53-L57.
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