Measuring the X-ray luminosities of SDSS DR7 clusters from ROSAT All Sky Survey

	Measuring the X-ray luminosities of SDSS DR7 clusters from ROSAT All Sky Survey
	Wang, Lei 1; Yang, Xiaohu 2,3; Shen, Shiyin 3; Mo, H. J.4; van den Bosch, Frank C.5; Luo, Wentao 3; Wang, Yu 6; Lau, Erwin T.7; Wang, Q. D.4; Kang, Xi 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-03-01
卷号	439 期号:1 页码:611-622
关键词	methods: statistical galaxies: haloes dark matter X-rays: galaxies: clusters
英文摘要	We use ROSAT All Sky Survey broad-band X-ray images and the optical clusters identified from Sloan Digital Sky Survey Data Release 7 to estimate the X-ray luminosities around similar to 65 000 candidate clusters with masses greater than or similar to 10(13) h(-1) M-circle dot based on an optical to X-ray (OTX) code we develop. We obtain a catalogue with X-ray luminosity for each cluster. This catalogue contains 817 clusters (473 at redshift z <= 0.12) with signal-to-noise ratio >3 in X-ray detection. We find about 65 per cent of these X-ray clusters have their most massive member located near the X-ray flux peak; for the rest 35 per cent, the most massive galaxy is separated from the X-ray peak, with the separation following a distribution expected from a Navarro-Frenk-White profile. We investigate a number of correlations between the optical and X-ray properties of these X-ray clusters, and find that the cluster X-ray luminosity is correlated with the stellar mass (luminosity) of the clusters, as well as with the stellar mass (luminosity) of the central galaxy and the mass of the halo, but the scatter in these correlations is large. Comparing the properties of X-ray clusters of similar halo masses but having different X-ray luminosities, we find that massive haloes with masses greater than or similar to 10(14) h(-1) M-circle dot contain a larger fraction of red satellite galaxies when they are brighter in X-ray. An opposite trend is found in central galaxies in relative low-mass haloes with masses less than or similar to 10(14) h(-1) M-circle dot where X-ray brighter clusters have smaller fraction of red central galaxies. Clusters with masses greater than or similar to 10(14) h(-1) M-circle dot that are strong X-ray emitters contain many more low-mass satellite galaxies than weak X-ray emitters. These results are also confirmed by checking X-ray clusters of similar X-ray luminosities but having different characteristic stellar masses. A cluster catalogue containing the optical properties of member galaxies and the X-ray luminosity is available at http://gax.shao.ac.cn/data/Group.html.
收录类别	SCI
语种	英语
WOS记录号	WOS:000333297700060
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6550]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Purple Mt Observ, Nanjing 210008, Peoples R China 2.Shanghai Jiao Tong Univ, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 3.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 4.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 5.Yale Univ, Dept Astron, New Haven, CT 06520 USA 6.Univ Sci & Technol China, Ctr Astrophys, Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China 7.Yale Univ, Dept Phys, New Haven, CT 06520 USA 8.Chinese Acad Sci, Natl Astron Observ, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lei,Yang, Xiaohu,Shen, Shiyin,et al. Measuring the X-ray luminosities of SDSS DR7 clusters from ROSAT All Sky Survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,439(1):611-622.
APA	Wang, Lei.,Yang, Xiaohu.,Shen, Shiyin.,Mo, H. J..,van den Bosch, Frank C..,...&Li, Ran.(2014).Measuring the X-ray luminosities of SDSS DR7 clusters from ROSAT All Sky Survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,439(1),611-622.
MLA	Wang, Lei,et al."Measuring the X-ray luminosities of SDSS DR7 clusters from ROSAT All Sky Survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 439.1(2014):611-622.