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|Title:||Measurement of the Halo Bias from Stacked Shear Profiles of Galaxy Clusters||Authors:||Covone, Giovanni
CARDONE, Vincenzo Fabrizio
|Issue Date:||2014||Journal:||THE ASTROPHYSICAL JOURNAL||Number:||784||Issue:||2||First Page:||L25||Abstract:||We present observational evidence of the two-halo term in the stacked shear profile of a sample of ~1200 optically selected galaxy clusters based on imaging data and the public shear catalog from the CFHTLenS. We find that the halo bias, a measure of the correlated distribution of matter around galaxy clusters, has amplitude and correlation with galaxy cluster mass in very good agreement with the predictions based on the LCDM standard cosmological model. The mass-concentration relation is flat but higher than theoretical predictions. We also confirm the close scaling relation between the optical richness of galaxy clusters and their mass.||Description:||We thank Keiichi Umetsu for stimulating discussions and the referee for clarifying comments. G.C. acknowledges financial support from the grant PRIN-INAF 2011 “Galaxy Evolution with the VLT Survey Telescope”; M.S. and V.F.C. acknowledge financial support from agreement ASI/INAF/I/023/12/0. This work is based on observations obtained with MegaPrime/MegaCam, a project of CFHT and CEA/IRFU, at the CFHT, operated by the Canadian NRC, the Institut National des Sciences de l'Univers of the CNRS of France, and the University of Hawaii. This research used the facilities of the Canadian Astronomy Data Centre operated by the NRC of Canada with the support of the Canadian Space Agency. CFHTLenS data processing was made possible thanks to computing support from the NSERC Research Tools and Instruments grant program.||URI:||http://hdl.handle.net/20.500.12386/12151||ISSN:||0004-637X||DOI:||10.1088/2041-8205/784/2/L25||Bibcode ADS:||2014ApJ...784L..25C|
|Appears in Collections:||1.01 Articoli in rivista|
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