{
  "id": "1409.4413",
  "version": "v1",
  "published": "2014-09-15T20:00:04.000Z",
  "updated": "2014-09-15T20:00:04.000Z",
  "title": "First CO(17-16) emission line detected in a z > 6 quasar",
  "authors": [
    "Simona Gallerani",
    "Andrea Ferrara",
    "Roberto Neri",
    "Roberto Maiolino"
  ],
  "comment": "6 pages, 4 figures, accepted for publication in MNRAS Letter",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We report the serendipitous detection of the CO(17-16) emission line toward the quasar SDSSJ114816.64+525150.3 (J1148) at redshift z = 6.4 obtained with the Plateau de Bure Interferometer. The CO(17-16) line is possibly contaminated by OH+ emission, that may account for ~ 35 - 60% of the total flux observed. Photo-Dissociation and X-ray Dominated Regions (PDRs and XDRs) models show that PDRs alone cannot reproduce the high luminosity of the CO(17-16) line relative to low-J CO transitions and that XDRs are required. By adopting a composite PDR+XDR model we derive molecular cloud and radiation field properties in the nuclear region of J1148. Our results show that highly excited CO lines represent a sensitive and possibly unique tool to infer the presence of X-ray faint or obscured supermassive black hole progenitors in high-z galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-09-15T20:00:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "emission line",
      "obscured supermassive black hole progenitors",
      "radiation field properties",
      "bure interferometer",
      "total flux"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnras/stu2031",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2014,
      "month": "Dec",
      "volume": 445,
      "number": 3,
      "pages": 2848
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1317179,
      "adsabs": "2014MNRAS.445.2848G"
    }
  }
}