Satellite kinematics - II. The halo mass-luminosity relation of central galaxies in SDSS

	Satellite kinematics - II. The halo mass-luminosity relation of central galaxies in SDSS
	More, Surhud 1; van den Bosch, Frank C.1; Cacciato, Marcello 1; Mo, H. J.2; Yang, Xiaohu 3; Li, Ran 2,4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2009-01-11
卷号	392 期号:2 页码:801-816
关键词	methods: statistical galaxies: fundamental parameters galaxies: haloes galaxies: kinematics and dynamics galaxies: structure dark matter
英文摘要	The kinematics of satellite galaxies reflect the masses of the extended dark matter haloes in which they orbit, and thus shed light on the mass-luminosity relation (MLR) of their corresponding central galaxies. In this paper, we select a large sample of centrals and satellites from the Sloan Digital Sky Survey and measure the kinematics (velocity dispersions) of the satellite galaxies as a function of the r-band luminosity of the central galaxies. Using the analytical framework presented in More, van den Bosch & Cacciato, we use these data to infer both the mean and the scatter of the MLR of central galaxies, carefully taking account of selection effects and biases introduced by the stacking procedure. As expected, brighter centrals on average reside in more massive haloes. In addition, we find that the scatter in halo masses for centrals of a given luminosity, sigma(log) (M), also increases with increasing luminosity. As we demonstrate, this is consistent with sigma(log L), which reflects the scatter in the conditional probability function P(L(c)\|M), being independent of halo mass. Our analysis of the satellite kinematics yields sigma(log L) = 0.16 +/- 0.04, in excellent agreement with constraints from clustering and group catalogues, and with predictions from a semi- analytical model of galaxy formation. We thus conclude that the amount of stochasticity in galaxy formation, which is characterized by sigma(log L) , is well constrained, independent of halo mass and in a good agreement with current models of galaxy formation.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DARK-MATTER HALOES ; DIGITAL SKY SURVEY ; LARGE-SCALE STRUCTURE ; SPIRAL GALAXIES ; OCCUPATION STATISTICS ; CROSS-CORRELATION ; COLOR DEPENDENCE ; DENSITY PROFILE ; REDSHIFT SURVEY ; EVOLUTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000261982100023
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19575]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 3.Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	More, Surhud,van den Bosch, Frank C.,Cacciato, Marcello,et al. Satellite kinematics - II. The halo mass-luminosity relation of central galaxies in SDSS[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,392(2):801-816.
APA	More, Surhud,van den Bosch, Frank C.,Cacciato, Marcello,Mo, H. J.,Yang, Xiaohu,&Li, Ran.(2009).Satellite kinematics - II. The halo mass-luminosity relation of central galaxies in SDSS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,392(2),801-816.
MLA	More, Surhud,et al."Satellite kinematics - II. The halo mass-luminosity relation of central galaxies in SDSS".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 392.2(2009):801-816.