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Mass function of rich galaxy clusters and its constraint on Sigma(8)
Wen, Z. L.1; Han, J. L.1; Liu, F. S.2
2010-09-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号407期号:1页码:533-543
摘要The mass function of galaxy clusters is a powerful tool to constrain cosmological parameters, e.g. the mass fluctuation on the scale of 8 h-1 Mpc, Sigma(8), and the abundance of total matter, (m). We first determine the scaling relations between cluster mass and cluster richness, summed r-band luminosity and the global galaxy number within a cluster radius. These relations are then used to two complete volume-limited rich cluster samples which we obtained from the Sloan Digital Sky Survey (SDSS). We estimate the masses of these clusters and determine the cluster mass function. Fitting the data with a theoretical expression, we get the cosmological parameter constraints in the form of Sigma(8)((m)/0.3)alpha = beta and find out the parameters of alpha = 0.40-0.50 and beta = 0.8-0.9, so that Sigma(8) = 0.8-0.9 if (m) = 0.3. Our Sigma(8) value is slightly higher than recent estimates from the mass function of X-ray clusters and the Wilkinson Microwave Anisotropy Probe (WMAP) data, but consistent with the weak lensing statistics.
关键词Galaxies: Clusters: General Cosmological Parameters
DOI10.1111/j.1365-2966.2010.16930.x
收录类别SCI
语种英语
WOS记录号WOS:000281140900045
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7773
专题射电天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Shenyang Normal Univ, Coll Phys Sci & Technol, Shenyang 110034, Peoples R China
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Wen, Z. L.,Han, J. L.,Liu, F. S.. Mass function of rich galaxy clusters and its constraint on Sigma(8)[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,407(1):533-543.
APA Wen, Z. L.,Han, J. L.,&Liu, F. S..(2010).Mass function of rich galaxy clusters and its constraint on Sigma(8).MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,407(1),533-543.
MLA Wen, Z. L.,et al."Mass function of rich galaxy clusters and its constraint on Sigma(8)".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 407.1(2010):533-543.
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