Finding low-mass groups to extend the cluster scaling relations

Details Finding low-mass groups to extend the cluster scaling relations Finding low-mass groups to extend the cluster scaling relations

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..133s&link_type=abstract

XMM-Newton Proposal ID #06731806

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Rxc J1257.1-133, Rxc J0920.0+010, Cl 0458-0029, Cl 2003-5556, Cgcg 184-039

Scientific paper

Galaxy groups are ideal systems to study baryon physics, which is important for both using clusters for precision cosmology and understanding galaxy formation and evolution. Over the last decade, our understanding on the ICM properties of galaxy groups has been greatly improved. However, we still know little about low-mass groups with M_{500}<10^13 h^-1 M_sun (or kT < 0.7 keV). Such low-mass groups are the lightest massive halos that can still hold significant amount of baryons. They are the ideal systems to examine the departures of scaling relations from a simple power law that are expected in simulations. This XMM proposal is a first step to select low-mass groups with M_{500}=3 - 10 x 10^12 h^-1 M_sun and the requested data are sufficient for some scaling relations.

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