THE STELLAR MASS COMPONENTS OF GALAXIES: COMPARING SEMI-ANALYTICAL MODELS WITH OBSERVATION

	THE STELLAR MASS COMPONENTS OF GALAXIES: COMPARING SEMI-ANALYTICAL MODELS WITH OBSERVATION
	Liu, Lei1,5 ; Yang, Xiaohu 1; Mo, H. J.2; van den Bosch, Frank C.3; Springel, Volker 4
刊名	ASTROPHYSICAL JOURNAL
	2010-03-20
卷号	712 期号:1 页码:734-745
关键词	dark matter galaxies: halos large-scale structure of universe
英文摘要	We compare the stellar masses of central and satellite galaxies predicted by three independent semi-analytical models (SAMs) with observational results obtained from a large galaxy group catalog constructed from the Sloan Digital Sky Survey. In particular, we compare the stellar mass functions of centrals and satellites, the relation between total stellar mass and halo mass, and the conditional stellar mass functions, Phi(M()\|M(h)), which specify the average number of galaxies of stellar mass M() that reside in a halo of mass M(h). The SAMs only predict the correct stellar masses of central galaxies within a limited mass range and all models fail to reproduce the sharp decline of stellar mass with decreasing halo mass observed at the low mass end. In addition, all models over-predict the number of satellite galaxies by roughly a factor of 2. The predicted stellar mass in satellite galaxies can be made to match the data by assuming that a significant fraction of satellite galaxies are tidally stripped and disrupted, giving rise to a population of intra-cluster stars (ICS) in their host halos. However, the amount of ICS thus predicted is too large compared to observation. This suggests that current galaxy formation models still have serious problems in modeling star formation in low-mass halos.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL-SKY-SURVEY ; DARK-MATTER HALOES ; N-BODY SIMULATIONS ; BRIGHTEST CLUSTER GALAXIES ; ACTIVE GALACTIC NUCLEI ; SATELLITE GALAXIES ; STAR-FORMATION ; OCCUPATION STATISTICS ; LUMINOSITY FUNCTION ; INTRACLUSTER LIGHT
收录类别	SCI
语种	英语
WOS记录号	WOS:000275222900064
公开日期	2015-02-02
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15519]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Shanghai Astron Observ, Partner Grp MPA, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 3.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 4.Max Planck Inst Astrophys, D-85748 Garching, Germany 5.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lei,Yang, Xiaohu,Mo, H. J.,et al. THE STELLAR MASS COMPONENTS OF GALAXIES: COMPARING SEMI-ANALYTICAL MODELS WITH OBSERVATION[J]. ASTROPHYSICAL JOURNAL,2010,712(1):734-745.
APA	Liu, Lei,Yang, Xiaohu,Mo, H. J.,van den Bosch, Frank C.,&Springel, Volker.(2010).THE STELLAR MASS COMPONENTS OF GALAXIES: COMPARING SEMI-ANALYTICAL MODELS WITH OBSERVATION.ASTROPHYSICAL JOURNAL,712(1),734-745.
MLA	Liu, Lei,et al."THE STELLAR MASS COMPONENTS OF GALAXIES: COMPARING SEMI-ANALYTICAL MODELS WITH OBSERVATION".ASTROPHYSICAL JOURNAL 712.1(2010):734-745.