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The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies

Abstract : We present the results of a search for galaxy clusters in the first 36 XMM-Newton pointings on the COSMOS field. We reach a depth for a total cluster flux in the 0.5-2 keV band of 3x10-15 ergs cm-2 s-1, having one of the widest XMM-Newton contiguous raster surveys, covering an area of 2.1 square degrees. 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 of 0.1-0.2 in redshift, using the multi-band photometric catalog of the COSMOS field and restricting the search to z<1.3 and i_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)-lg(S) 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=1.93+/-0.04. For the probed luminosity range of 8x10+42 - 2x10+44 ergs s-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.
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Preprints, Working Papers, ...
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https://hal.archives-ouvertes.fr/hal-00129186
Contributor : Catherine Beaussier <>
Submitted on : Tuesday, February 6, 2007 - 11:00:14 AM
Last modification on : Thursday, October 15, 2020 - 3:36:27 AM

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A. Finoguenov, L. Guzzo, G. Hasinger, N. Z. Scoville, H. Aussel, et al.. The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies. 2006. ⟨hal-00129186⟩

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