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Journal articles

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

Abstract : 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.

Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA.

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Submitted on : Tuesday, April 19, 2022 - 4:22:48 PM
Last modification on : Wednesday, April 20, 2022 - 3:40:05 AM

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V. G. Gurzadyan, F. Durret, T. Ghahramanyan, A. L. Kashin, H. G. Khachatryan, et al.. Detection of X-ray galaxy clusters based on the Kolmogorov method. Europhysics Letters, 2011, 95, pp.69001. ⟨10.1209/0295-5075/95/69001⟩. ⟨insu-03645900⟩

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