Mass Profiles and Concentration Parameters for 148 Clusters at z<0.3

Details Mass Profiles and Concentration Parameters for 148 Clusters at z<0.3 Mass Profiles and Concentration Parameters for 148 Clusters at z<0.3

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21831901r&link_type=abstract

American Astronomical Society, AAS Meeting #218, #319.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We combine the CIRS (Cluster Infall Regions in SDSS) sample of 72 clusters at z<0.1 with the HeCS (Hectospec Cluster Survey) sample of 74 clusters in the redshift range 0.1-0.3. Both samples are X-ray flux limited. HeCS contains over 20,000 new redshifts obtained with Hectospec on the MMT. We apply the caustic technique to this full sample of 148 clusters to measure M200 directly and to derive the NFW concentration from the fits of the mass profile to each cluster. We derive the correlation between concentration and mass and its spread at fixed mass and compare these measurements with the expected results from numerical simulations. We also tested the conjecture from some weak lensing studies that cluster concentrations substantially exceed model predictions.
This work is supported in part by a Cottrell College Science Award from the Research Corporation.

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