The XMM-Newton Wide-Field Survey in the COSMOS Field: Statistical Properties of Clusters of Galaxies

• Autor: Finoguenov, A ; Guzzo, L ; Hasinger, G ; Scoville, N. Z ; Aussel, H ; Böhringer, H ; Brusa, M ; Capak, P ; Cappelluti, N ; Comastri, A ; Giodini, S ; Griffiths, R. E ; Impey, C ; Koekemoer, A. M ; Kneib, J.-P ; Leauthaud, A ; Le Fèvre, O ; Lilly, S ; Mainieri, V ; Massey, R ; McCracken, H. J ; Mobasher, B ; Murayama, T ; Peacock, J. A ; Sakelliou, I ; Schinnerer, E ; Silverman, J. D ; Smolčić, V ; Taniguchi, Y ; Tasca, L ; Taylor, J. E ; Trump, J. R ; Zamorani, G
• Assuntos: Astrophysics ; Physics
• É parte de: The Astrophysical journal, 2007-09, Vol.172 (1), p.182-195
• Notas: ObjectType-Article-2
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• Descrição: We present the results of a search for galaxy dusters in the first 36 XMM-Newton pointings on the Cosmic Evolution Survey (COSMOS) field. We reach a depth for a total cluster flux in the 0.5-2 keV band of 3 x 10 super(-15) ergs cm sub(-2) s sub(-1), having one of the widest XMM-Newton contiguous raster surveys, covering an area of 2.1 deg super(2). Cluster candidates are identified through a wavelet detection of extended X-ray emission. Verification of the cluster candidates is done based on a galaxy concentration analysis in redshift slices of thickness 0.1-0.2 in redshift, using the multiband photometric catalog of the COSMOS field and restricting the search to z < 1.3 and i sub(AB) < 25. We identify 72 clusters and derive their properties based on the X-ray cluster scaling relations. A statistical description of the survey in terms of the cumulative log (N > S) - logS distribution compares well with previous results, although yielding a somewhat higher number of clusters at similar fluxes. The X-ray luminosity function of COSMOS clusters matches well the results of nearby surveys, providing a comparably tight constraint on the faint-end slope of alpha = 1.03 plus or minus 0.04. For the probed luminosity range of (8 x 10 super(42))-(2 x 10 super(44)) ergs s sub(-1), our survey is In agreement with and adds significantly to the existing data on the cluster luminosity function at high redshifts and implies no substantial evolution at these luminosities to z = 1.3.
  
• Editor: IOP Publishing
  
• Idioma: Inglês