CLASH: The CONCENTRATION-MASS RELATION of GALAXY CLUSTERS

  • 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. Czakon
  • D. 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 journalArticlepeer-review

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 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
Volume806
Issue number1
DOIs
StatePublished - Jun 10 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

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

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