{
  "id": "1003.0938",
  "version": "v1",
  "published": "2010-03-04T00:35:17.000Z",
  "updated": "2010-03-04T00:35:17.000Z",
  "title": "New 9.9-GHz methanol masers",
  "authors": [
    "M. A. Voronkov",
    "J. L. Caswell",
    "S. P. Ellingsen",
    "A. M. Sobolev"
  ],
  "comment": "accepted for publication in MNRAS, 14 pages, 3 figures, 4 tables",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "The Australia Telescope Compact Array (ATCA) has been used to make the first extensive search for the class I methanol masers at 9.9 GHz. In total, 48 regions of high-mass star formation were observed. In addition to masers in W33-Met (G12.80-0.19) and G343.12-0.06 (IRAS 16547-4247) which have already been reported in the literature, two new 9.9-GHz masers have been found towards G331.13-0.24 and G19.61-0.23. We have determined absolute positions (accurate to roughly a second of arc) for all the detected masers and suggest that some class I masers may be associated with shocks driven into molecular clouds by expanding HII regions. Our observations also imply that the evolutionary stage of a high-mass star forming region when the class I masers are present can outlast the stage when the class II masers at 6.7 GHz are detectable, and overlaps significantly with the stage when OH masers are active.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-03-04T00:35:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "methanol masers",
      "australia telescope compact array",
      "high-mass star formation",
      "high-mass star forming region",
      "evolutionary stage"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1111/j.1365-2966.2010.16624.x",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "Jul",
      "volume": 405,
      "number": 4,
      "pages": 2471
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 847755,
      "adsabs": "2010MNRAS.405.2471V"
    }
  }
}