THE SUBHALO-SATELLITE CONNECTION AND THE FATE OF DISRUPTED SATELLITE GALAXIES

	THE SUBHALO-SATELLITE CONNECTION AND THE FATE OF DISRUPTED SATELLITE GALAXIES
	Yang, Xiaohu 1; Mo, H. J.2; van den Bosch, Frank C.3
刊名	ASTROPHYSICAL JOURNAL
	2009-03-01
卷号	693 期号:1 页码:830-838
关键词	dark matter galaxies: halos large-scale structure of universe
英文摘要	In the standard paradigm, satellite galaxies are believed to be associated with the population of dark matter subhalos. The assumption usually made is that the relationship between satellite galaxies and subhalos is similar to that between central galaxies and host halos. In this paper, we use the conditional stellar mass functions of satellite galaxies obtained from a large galaxy group catalog together with models of the subhalo mass functions to explore the consequences of such assumption in connection to the stellar mass function of satellite galaxies and the fraction and fate of stripped stars from satellites in galaxy groups and clusters of different masses. The majority of the stripped stars in massive halos are predicted to end up as intracluster stars, and the predicted amounts of the intracluster component as a function of the velocity dispersion of galaxy system match well the observational results obtained by Gonzalez et al. (2007). The fraction of the mass in the stripped stars to that remain bound in the central and satellite galaxies is the highest (similar to 40% of the total stellar mass) in halos with masses M(h) similar to 10(14) h(-1) M(circle dot). If all these stars end up in the intracluster component (Max), or a maximum amount of these stars is accreted into the central galaxy (Min), then the maximum fraction of the total stars in the whole universe that is in the diffused intracluster component is similar to 19%, and the minimum is similar to 5%. In the case of "Max," the stellar mass of the intracluster component in massive halos with M(h) similar to 10(15) h(-1) M(circle dot) is roughly six times as large as that of the central galaxy. This factor decreases to similar to 2, 1, and 0.1 in halos with M(h) similar to 10(14), 10(13), and 10(12) h(-1) M(circle dot), respectively. The total amount of stars stripped from satellite galaxies is insufficient to build up the central galaxies in halos with masses less than or similar to 10(12.5) h(-1) M(circle dot), and so the quenching of star formation must occur in halos with higher masses. In semianalytical models and simulations that do not resolve the diffused component, caution must be exercised when using the observed stellar mass/luminosity function of galaxies to constrain the star formation, feedback and merger processes in dark matter halos.
学科主题	星系与宇宙学研究中心
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 ; COLD DARK-MATTER ; HALO OCCUPATION DISTRIBUTION ; PAIRWISE VELOCITY DISPERSION ; BRIGHTEST CLUSTER GALAXIES ; DIFFUSE INTRAHALO LIGHT ; INTRACLUSTER LIGHT ; MASS-LOSS ; COSMOLOGICAL SIMULATIONS ; LUMINOSITY FUNCTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000263903300069
公开日期	2010-11-08
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/11883]
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.Max Planck Inst Astron, D-69117 Heidelberg, Germany
推荐引用方式 GB/T 7714	Yang, Xiaohu,Mo, H. J.,van den Bosch, Frank C.. THE SUBHALO-SATELLITE CONNECTION AND THE FATE OF DISRUPTED SATELLITE GALAXIES[J]. ASTROPHYSICAL JOURNAL,2009,693(1):830-838.
APA	Yang, Xiaohu,Mo, H. J.,&van den Bosch, Frank C..(2009).THE SUBHALO-SATELLITE CONNECTION AND THE FATE OF DISRUPTED SATELLITE GALAXIES.ASTROPHYSICAL JOURNAL,693(1),830-838.
MLA	Yang, Xiaohu,et al."THE SUBHALO-SATELLITE CONNECTION AND THE FATE OF DISRUPTED SATELLITE GALAXIES".ASTROPHYSICAL JOURNAL 693.1(2009):830-838.