P. T. P. Viana

Abstract
The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMM-Newton Science Archive. Our recent first data release (XCS-DR1) contains 503 optically confirmed groups and clusters, among which 255 new to the literature and 356 new X-ray discoveries. We will provide an update on XCS-DR1 and describe the properties of the systems found so far. Focusing on the 17 fossil groups/clusters identified with the help of the Sloan Digital Sky Survey, we will show that brightest galaxies in these systems have stellar populations and star-formation histories which are similar to normal brightest cluster galaxies, but their stellar masses are significantly larger and correspond to a much bigger fraction of the total group/cluster optical luminosity. We will also highlight the 15 clusters expected to be also detected by the Planck satellite, characterize the expected overlap between the final XCS and Planck cluster catalogues, and discuss joint applications of the XCS and Planck data. Finally, we expect to be able to present preliminary constraints on the values of &sgima;₈ and Ω_m, derived from XCS data, and compare them with our previous forecasts.

XMM-Newton 2012 Science Workshop
Madrid, Spain
2012 May

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