{
  "id": "1204.5535",
  "version": "v1",
  "published": "2012-04-25T02:17:10.000Z",
  "updated": "2012-04-25T02:17:10.000Z",
  "title": "Statistical Properties of Molecular Clumps in the Galactic Center 50 km s$^{-1}$ Molecular Cloud",
  "authors": [
    "Masato Tsuboi",
    "Atsushi Miyazaki"
  ],
  "comment": "16 pages, 5 figures, accepted for publication in PASJ",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the statistical properties of molecular clumps in the Galactic center 50 km s$^{-1}$ molecular cloud (GCM-0.02-0.07) based on observations of the CS $J=1-0$ emission line with the Nobeyama Millimeter Array. In the cloud, 37 molecular clumps with local thermal equilibrium (LTE) masses of $2\\times10^2-6\\times10^3 M_\\odot$ were identified by using the {\\it clumpfind} algorithm. The velocity widths of the molecular clumps are about five-fold those of Galactic disk molecular clouds with the same radius. The virial-theorem masses are three-fold the LTE masses. The mass and size spectra can be described by power laws of $dN/dM\\propto M^{-2.6\\pm0.1}$ ($M\\gtrsim 900M_\\odot$) and $dN/dR\\propto R^{-5.9\\pm0.3}$ ($R\\gtrsim 0.35$ pc), respectively. The statistical properties of the region interacting with the Sgr A East shell and those of the non-interacting part of the cloud are significantly different. The interaction probably makes the mass function steeper, from $dN/dM\\propto M^{-2.0\\pm0.1}$ in the non-interacting part to $dN/dM\\propto M^{-4.0\\pm0.2}$ in the interacting region. On the other hand, the interaction presumably truncates the size spectrum on the larger side of $R\\sim 0.4$ pc.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-04-25T02:17:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "molecular clumps",
      "statistical properties",
      "galactic center",
      "galactic disk molecular clouds",
      "mass function steeper"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/pasj/64.5.111",
      "journal": "Publications of the Astronomical Society of Japan",
      "year": 2012,
      "month": "Oct",
      "volume": 64,
      "pages": 111
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1112232,
      "adsabs": "2012PASJ...64..111T"
    }
  }
}