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Detection of X-ray galaxy clusters based on the Kolmogorov method

The detection of clusters of galaxies in large surveys plays an important part in extragalactic astronomy, and particularly in cosmology, since cluster counts can give strong constraints on cosmological parameters. X-ray imaging is in particular a reliable means to discover new clusters, and large X-ray surveys are now available. Considering XMM-Newton data for a sample of 40 Abell clusters, we show that their analysis with a Kolmogorov distribution can provide a distinctive signature for galaxy clusters. The Kolmogorov method is sensitive to the correlations in the cluster X-ray properties and can therefore be used for their identification, thus allowing to search reliably for clusters in a simple way.

preprint2012arXivOpen access
V. G. GurzadyanF. DurretT. GhahramanyanA. L. KashinH. G. KhachatryanE. Poghosian
astro-ph.CO
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Open access6 authors1 topic
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V. G. GurzadyanF. DurretT. GhahramanyanA. L. KashinH. G. KhachatryanE. Poghosian

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