{
  "id": "1012.4943",
  "version": "v1",
  "published": "2010-12-22T11:28:00.000Z",
  "updated": "2010-12-22T11:28:00.000Z",
  "title": "Herschel-HIFI observations of H2O in high-mass star-forming regions: first results",
  "authors": [
    "Floris van der Tak",
    "Fabrice Herpin",
    "Friedrich Wyrowski",
    "for the high-mass WISH team"
  ],
  "comment": "4 pages; to appear in the proceedings of the conference \"Conditions and Impact of Star Formation\" (Zermatt 2010)",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "This paper reviews the first results of observations of H2O line emission with Herschel-HIFI towards high-mass star-forming regions, obtained within the WISH guaranteed time program. The data reveal three kinds of gas-phase H2O: `cloud water' in cold tenuous foreground clouds, `envelope water' in dense protostellar envelopes, and `outflow water' in protostellar outflows. The low H2O abundance (1e-10 -- 1e-9) in foreground clouds and protostellar envelopes is due to rapid photodissociation and freeze-out on dust grains, respectively. The outflows show higher H2O abundances (1e-7 -- 1e-6) due to grain mantle evaporation and (probably) neutral-neutral reactions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-12-22T11:28:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high-mass star-forming regions",
      "first results",
      "herschel-hifi observations",
      "low h2o abundance",
      "h2o line emission"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/eas/1152033"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 882167,
      "adsabs": "2011EAS....52..201V"
    }
  }
}