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Measurement of the halo bias from stacked shear profiles of galaxy clusters

We present the observational evidence of the 2-halo term in the stacked shear profile of a sample of about 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.

preprint2014arXivOpen access
Giovanni CovoneMauro SerenoMartin KilbingerVincenzo F. Cardone
astro-ph.CO
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Open access4 authors1 topic
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Giovanni CovoneMauro SerenoMartin KilbingerVincenzo F. Cardone

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