Detection of X-ray galaxy clusters based on the Kolmogorov method
Alikhanian National Laboratory and Yerevan State University - Yerevan, Armenia
2 UPMC Université Paris 06, UMR 7095 - Paris, France, EU
3 Institut d'Astrophysique de Paris - F-75014, Paris, France, EU
Accepted: 28 July 2011
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.
PACS: 98.65.Cw – Galaxy clusters / 98.65.-r – Galaxy groups, clusters, and superclusters; large scale structure of the Universe
© EPLA, 2011