The dark matter distribution in high redshift clusters: probing evolution.

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Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Rx J0744.8+3927, Rx J0257.1-2325, Rx J0647.7+7015, Xmm-Newton Proposal Id #05518503

Scientific paper

We propose to measure the mass profiles of a complete sample of massive, relaxed galaxy clusters at z greater than 0.5, with a precision equal to that currently obtained for local objects. We will assess the evolution of the dark matter concentration at cluster scales, a critical test of theoretical scenario of structure formation. This data set will also strongly constrain the evolution of fundamental mass-proxy relations and the evolution of the gas entropy profiles in the high mass regime, a critical test of gravitational gas heating.

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