Mass and entropy in the most dynamically disturbed REXCESS clusters

Details Mass and entropy in the most dynamically disturbed REXCESS clusters Mass and entropy in the most dynamically disturbed REXCESS clusters

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..156p&link_type=abstract

XMM-Newton Proposal ID #06544404

Mathematics

Logic

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Rxcj2157.4-0747, Rxc J2129.8-504, Rxc J0145.0-530, Rxc J2048.1-175

Scientific paper

We propose to re-observe the four most morphologically disturbed clusters in the REXCESS sample. Our aim is to measure the temperature at R_500 and improve the spatial resolution of the temperature profiles in the flat surface brightness central regions, in order to have measurements of similar quality to that available for relaxed systems. With these data we will precisely measure the HE mass profiles, to test the hypothesis that unrelaxed systems have less concentrated mass distributions, a critical test of the dark matter collapse. We will also dramatically improve measurements of the entropy in the central regions, to provide a critical benchmark for numerical simulations.

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