Understanding Bias in Mass Selection vs. Baryon Selection of Clusters

Details Understanding Bias in Mass Selection vs. Baryon Selection of Clusters Understanding Bias in Mass Selection vs. Baryon Selection of Clusters

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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