Building a representative sample of local galaxy groups

Details Building a representative sample of local galaxy groups Building a representative sample of local galaxy groups

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...48s&link_type=abstract

XMM-Newton Proposal ID #06019305

Physics

Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Cl1058+0137, Cl0334-3901, Cl1259+3120, Cl0306-0944, Cl2137+0027

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, there is no a representative group sample with Chandra or XMM that allows full coverage to r_500. We have defined such a sample of 13 galaxy groups that also takes advantage of the existing Chandra and XMM data. They are purely X-ray luminosity selected from the 400 deg^2 survey. We propose to observe the low-L_X bin in this cycle to start the project. The final sample can also be combined with the REXCESS sample to extend its luminosity threshold by a factor of ten.

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