{
  "id": "1501.04286",
  "version": "v1",
  "published": "2015-01-18T12:13:16.000Z",
  "updated": "2015-01-18T12:13:16.000Z",
  "title": "Optical and X-ray profiles in the REXCESS sample of galaxy clusters",
  "authors": [
    "John G. Holland",
    "Hans Böhringer",
    "Gayoung Chon",
    "Daniele Pierini"
  ],
  "doi": "10.1093/mnras/stv097",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "Galaxy clusters' structure, dominated by dark matter, is traced by member galaxies in the optical and hot intra-cluster medium (ICM) in X-rays. We compare the radial distribution of these components and determine the mass-to-light ratio vs. system mass relation. We use 14 clusters from the REXCESS sample which is representative of clusters detected in X-ray surveys. Photometric observations with the Wide Field Imager on the 2.2m MPG/ESO telescope are used to determine the number density profiles of the galaxy distribution out to $r_{200}$. These are compared to electron density profiles of the ICM obtained using XMM-Newton, and dark matter profiles inferred from scaling relations and an NFW model. While red sequence galaxies trace the total matter profile, the blue galaxy distribution is much shallower. We see a deficit of faint galaxies in the central regions of massive and regular clusters, and strong suppression of bright and faint blue galaxies in the centres of cool-core clusters, attributable to ram pressure stripping of gas from blue galaxies in high density regions of ICM and disruption of faint galaxies due to galaxy interactions. We find a mass-to-light ratio vs. mass relation within $r_{200}$ of $\\left(3.0\\pm0.4\\right) \\times 10^2\\, h\\,\\mathrm{M}_{\\odot}\\,\\mathrm{L}_{\\odot}^{-1}$ at $10^{15}\\,\\mathrm{M}_{\\odot}$ with slope $0.16 \\pm 0.14$, consistent with most previous results.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-01-18T12:13:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galaxy clusters",
      "rexcess sample",
      "x-ray profiles",
      "blue galaxy",
      "galaxy distribution"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1340043
    }
  }
}