CLASH: The Concentration-Mass Relation of Galaxy Clusters

Merten, J.; Meneghetti, M.; Postman, M.; Umetsu, K.; Zitrin, A.; Medezinski, E.; Nonino, M.; Koekemoer, A.; Melchior, P.; Gruen, D.; Moustakas, L.A.; Bartelmann, M.; Host, O.; Donahue, M.; Coe, D.; Molino, A.; Jouvel, S.; Monna, A.; Seitz, S.; Czakon, N.; Lemze, D.; Sayers, J.; Balestra, I.; Rosati, P.; Benítez, N.; Biviano, A.; Bouwens, R.; Bradley, L.; Broadhurst, T.; Carrasco, M.; Ford, H.; Grillo, C.; Infante, L.; Kelson, D.; Lahav, O.; Massey, R.; Moustakas, J.; Rasia, E.; Rhodes, J.; Vega, J.; Zheng, W.

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 $0.53\times {{10}^{15}}\;{{M}_{\odot }}/h$ and $1.76\times {{10}^{15}}\;{{M}_{\odot }}/h$ and the halo concentrations are distributed around ${{c}_{200c}}\sim 3.7$ with a $1\sigma $ 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.

Citation

Merten, J., Meneghetti, M., Postman, M., Umetsu, K., Zitrin, A., Medezinski, E., …Zheng, W. (2015). CLASH: The Concentration-Mass Relation of Galaxy Clusters. Astrophysical Journal, 806(1), Article 4. https://doi.org/10.1088/0004-637x/806/1/4

• Journal Article Type: Article
• Acceptance Date: Apr 2, 2015
• Online Publication Date: Jun 3, 2015
• Publication Date: Jun 10, 2015
• Deposit Date: Dec 10, 2014
• Publicly Available Date: Sep 7, 2015
• Journal: Astrophysical Journal
• Print ISSN: 0004-637X
• Electronic ISSN: 1538-4357
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 806
• Issue: 1
• Article Number: 4
• DOI: https://doi.org/10.1088/0004-637x/806/1/4
• Keywords: Dark matter, Galaxies: clusters: general, Gravitational lensing: strong, Gravitational lensing: weak.
• Public URL: https://durham-repository.worktribe.com/output/1416008
• Publisher URL: http://adsabs.harvard.edu/abs/2014arXiv1404.1376M
• Related Public URLs: http://adsabs.harvard.edu/abs/2014arXiv1404.1376M