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

Research output: Contribution to journalArticle

105 Scopus citations


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 and and the halo concentrations are distributed around with a 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.

Original languageEnglish (US)
Article number4
JournalAstrophysical Journal
Issue number1
StatePublished - Jun 10 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • dark matter
  • galaxies: clusters: general
  • gravitational lensing: strong
  • gravitational lensing: weak

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    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., ... Zheng, W. (2015). CLASH: The CONCENTRATION-MASS RELATION of GALAXY CLUSTERS. Astrophysical Journal, 806(1), [4].