Exploring galaxy formation models and cosmologies with galaxy clustering

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 星系中的恒星形成研究团组

	Exploring galaxy formation models and cosmologies with galaxy clustering
	Kang, X.1 ; Li, M.1; Lin, W. P.2; Elahi, P. J.2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2012-05-01
卷号	422 期号:1 页码:804-811
关键词	methods: analytical galaxies: formation galaxies: luminosity function, mass function cosmology: theory dark matter large-scale structure of Universe
ISSN号	0035-8711
英文摘要	Using N-body simulations and galaxy formation models, we study the galaxy stellar mass correlation and the two-point autocorrelation. The simulations are run with cosmological parameters from the Wilkinson Microwave Anisotropy Probe (WMAP) first-, third-and seven-year results, which mainly differ in the perturbation amplitude of sigma(8). The stellar mass of galaxies is determined using either a semi-analytical galaxy formation model or a simple empirical abundance matching method. Compared to the Sloan Digital Sky Survey (SDSS) DR7 data at z = 0 and the DEEP2 results at z = 1, we find that the predicted galaxy clusterings from the semi-analytical model are higher than the data at small scales, regardless of the adopted cosmology. Conversely, the abundance matching method predicts good agreement with the data at both z = 0 and z = 1 for high-sigma(8) cosmologies (WMAP1 and WMAP7), but the predictions from a low-sigma(8) cosmology (WMAP3) are significantly lower than the data at z = 0. We find that the excess clustering at small scales in the semi-analytical model mainly arises from satellites in massive haloes, indicating that either the star formation is too efficient in low-mass haloes or tidal stripping is too inefficient at high redshift. Our results show that galaxy clustering is strongly affected by the models for galaxy formation, and thus can be used to constrain the baryonic physics. The weak dependence of galaxy clustering on cosmological parameters makes it difficult to constrain the WMAP1 and WMAP7 cosmologies.
学科主题	Astronomy & Astrophysics
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 ; PROBE WMAP OBSERVATIONS ; REDSHIFT SURVEY ; STELLAR MASS ; HALO MASS ; SEMIANALYTICAL MODEL ; LUMINOSITY ; DEPENDENCE ; DEEP2 ; SDSS
收录类别	SCI
语种	英语
WOS记录号	WOS:000303912600082
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8064]
专题	紫金山天文台_星系中的恒星形成研究团组
作者单位	1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Kang, X.,Li, M.,Lin, W. P.,et al. Exploring galaxy formation models and cosmologies with galaxy clustering[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,422(1):804-811.
APA	Kang, X.,Li, M.,Lin, W. P.,&Elahi, P. J..(2012).Exploring galaxy formation models and cosmologies with galaxy clustering.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,422(1),804-811.
MLA	Kang, X.,et al."Exploring galaxy formation models and cosmologies with galaxy clustering".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 422.1(2012):804-811.