Computer Science
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..131f&link_type=abstract
XMM-Newton Proposal ID #06731505
Computer Science
Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Dls Field 1, Dls Field 2, Dls Field 3, Dls Field 4, Dls Field 5
Scientific paper
Dark matter is the dominant contribution to the matter density in the Universe, but the baryonic component, seen in galaxies and in hot gas, is the most readily studied. For the first time, with the complete spectroscopic survey of 11,692 galaxies in the ``9 hr Deep Lensing Survey'' field, clusters can be identified both through the convergence map peaks and through velocity distributions. Twenty massive clusters with velocity dispersions >500 km/s and 12 weak lensing peaks have been found in the DLS. We will investigate the bias in mass selection vs. baryon selection by completing XMM-Newton observations of this sample. For the X-ray brighter clusters, we also will compare the total masses computed from cluster velocity dispersions, from gravitational lensing, and from robust, X-ray measured, mass proxies.
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