{
  "id": "0712.0496",
  "version": "v1",
  "published": "2007-12-04T12:07:55.000Z",
  "updated": "2007-12-04T12:07:55.000Z",
  "title": "Near-infrared evolution of brightest cluster galaxies in the most X-ray luminous clusters since z=1",
  "authors": [
    "J. P. Stott",
    "A. C. Edge",
    "G. P. Smith",
    "A. M. Swinbank",
    "H. Ebeling"
  ],
  "comment": "9 figures, MNRAS in press",
  "journal": "MNRAS, Volume 384, Issue 4, pp. 1502-1510 (2008)",
  "doi": "10.1111/j.1365-2966.2007.12807.x",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We investigate the near infrared evolution of brightest cluster galaxies (BCGs) from a sample of rich galaxy clusters since z=1. By employing an X-ray selection of Lx>1e44 erg s-1 we limit environmental effects by selecting BCGs in comparably high density regions. We find a positive relationship between X-ray and near-infrared luminosity for BCGs in clusters with Lx>5e44 erg s-1. Applying a correction for this relation we reduce the scatter in the BCG absolute magnitude by a factor of 30%. The near-infrared J-K colour evolution demonstrates that the stellar population in BCGs has been in place since at least z=2 and that we expect a shorter period of star formation than that predicted by current hierarchical merger models. We also confirm that there is a relationship between `blue' J-K colour and the presence of BCG emission lines associated with star formation in cooling flows.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-12-04T12:07:55.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "brightest cluster galaxies",
      "x-ray luminous clusters",
      "near-infrared evolution",
      "near-infrared j-k colour evolution demonstrates",
      "star formation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Wiley-Blackwell",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2008,
      "month": "Mar",
      "volume": 384,
      "number": 4,
      "pages": 1502
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 769511,
      "adsabs": "2008MNRAS.384.1502S"
    }
  }
}