Statistical cluster-QSO weak lensing in the Sloan Digital Sky Survey

	Statistical cluster-QSO weak lensing in the Sloan Digital Sky Survey
	Wen, Zhong-Lue ; Yang, Yan-Bin ; Zhou, Xu; Yuan, Qi-Rong ; Ma, Jun
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2006
卷号	6 期号:5 页码:521-529
关键词	cosmology : observations galaxies : clusters : general quasars : general gravitational lensing
英文摘要	We investigate the cross-correlation between galaxy clusters and QSOs using Sloan Digital Sky Survey (SDSS) DR4 similar to 5000 deg(2) data. With photometric redshifts of galaxies, we select galaxy clusters based on the local projected densities of LRGs brighter than M-r' = -22. The QSOs are from the main sample of SDSS QSO spectroscopic survey to i' = 19. A significant positive correlation is found between the clusters and QSOs. Under the assumption that the signal is caused by gravitational lensing, we fit the signal with singular isothermal sphere (SIS) model and NFW profile halo model. The velocity dispersion sigma(v) = 766 km s(-1) is derived for the best-fit of SIS model. Best-fit for the NFW model requires the dark matter halo mass within 1.5 h(-1) Mpc to be 4.6 x 10(14) h(-1) M-.. The mass parameter Omega(cl) of the cluster sample is deduced as 0.077 with the SIS model and 0.083 with the NFW model. Our results of Omega(cl) are smaller than those given by Croom & Shanks and by Myers et al.
收录类别	SCI
语种	英语
WOS记录号	WOS:000241487800003
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7113]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Nanjing Normal Univ, Dept Phys, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Wen, Zhong-Lue,Yang, Yan-Bin,Zhou, Xu,et al. Statistical cluster-QSO weak lensing in the Sloan Digital Sky Survey[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2006,6(5):521-529.
APA	Wen, Zhong-Lue,Yang, Yan-Bin,Zhou, Xu,Yuan, Qi-Rong,&Ma, Jun.(2006).Statistical cluster-QSO weak lensing in the Sloan Digital Sky Survey.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,6(5),521-529.
MLA	Wen, Zhong-Lue,et al."Statistical cluster-QSO weak lensing in the Sloan Digital Sky Survey".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 6.5(2006):521-529.