{
  "id": "1409.7143",
  "version": "v1",
  "published": "2014-09-25T03:02:59.000Z",
  "updated": "2014-09-25T03:02:59.000Z",
  "title": "ALMA Observations of the IRDC Clump G34.43+00.24 MM3: 278 GHz Class I Methanol Masers",
  "authors": [
    "Takahiro Yanagida",
    "Takeshi Sakai",
    "Tomoya Hirota",
    "Nami Sakai",
    "Jonathan B. Foster",
    "Patricio Sanhueza",
    "James M. Jackson",
    "Kenji Furuya",
    "Yuri Aikawa",
    "Satoshi Yamamoto"
  ],
  "comment": "15 pages, 4 figures, accepted to ApJL",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We have observed a molecular clump (MM3) associated with the infrared dark cloud G34.43+00.24 in the CH3OH J_K=9_{-1}--8_0 E, 5_0-4_0 E, and 5_{-1}-4_{-1} E lines at sub-arcsecond resolution by using the Atacama Large Millimeter/submillimeter Array. By comparing the CH3OH J_K=9_{-1}-8_0 E emission with the CH3OH 5_0-4_0 E and 5_{-1}-4_{-1} E emission, we have found that the CH3OH J_K=9_{-1}-8_0 E emission is masing. We have clearly shown that the CH3OH J_K=9_{-1}-8_0 masers arise from the post shocked gas in the interacting regions between the outflows and ambient dense gas. Toward the strongest peak of the CH3OH maser emission, SiO J=6-5 emission is very weak. This indicates that the CH3OH maser emission traces relatively old shocks or weak shocks.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-09-25T03:02:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "methanol masers",
      "ghz class",
      "irdc clump",
      "alma observations",
      "traces relatively old shocks"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/794/1/L10",
      "journal": "The Astrophysical Journal",
      "year": 2014,
      "month": "Oct",
      "volume": 794,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014ApJ...794L..10Y"
    }
  }
}