CLASH: The Concentration-Mass Relation of Galaxy Clusters
Infante, L.; Zheng, W.; Molino, A.; Moustakas, J.; Zitrin, A.; Gruen, D.; Rasia, E.; Grillo, C.; Balestra, I.; Rosati, P.; Meneghetti, M.; Moustakas, L. A.; Nonino, M.; Coe, D.; Koekemoer, A.; Lahav, O.; Melchior, P.; Massey, R.; Rhodes, J.; Biviano, A.; Bouwens, R.; Postman, M.; Seitz, S.; Broadhurst, T.; Jouvel, S.; Benítez, N.; Bradley, L.; Ford, H.; Host, O.; Bartelmann, M.; Donahue, M.; Kelson, D.; Lemze, D.; Medezinski, E.; Merten, J.; Umetsu, K.; Carrasco, M.; Monna, A.; Sayers, J.; Vega, J.; Czakon, N.
United States, United Kingdom, Italy, Taiwan, Germany, Denmark, Spain, Netherlands, Chile, France
Abstract
We present a new determination of the concentration-mass (c-M) relation for galaxy clusters based on our comprehensive lensing analysis of 19 X-ray selected galaxy clusters from the Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans a redshift range between 0.19 and 0.89. We combine weak-lensing constraints from the Hubble Space Telescope (HST) and from ground-based wide-field data with strong lensing constraints from HST. The results are reconstructions of the surface-mass density for all CLASH clusters on multi-scale grids. Our derivation of Navarro-Frenk-White parameters yields virial masses between 0.53× {{10}15} {{M}⊙ }/h and 1.76× {{10}15} {{M}⊙ }/h and the halo concentrations are distributed around {{c}200c}∼ 3.7 with a 1σ significant negative slope with cluster mass. We find an excellent 4% agreement in the median ratio of our measured concentrations for each cluster and the respective expectation from numerical simulations after accounting for the CLASH selection function based on X-ray morphology. The simulations are analyzed in two dimensions to account for possible biases in the lensing reconstructions due to projection effects. The theoretical c-M relation from our X-ray selected set of simulated clusters and the c-M relation derived directly from the CLASH data agree at the 90% confidence level.