{
  "id": "1411.4308",
  "version": "v1",
  "published": "2014-11-16T21:43:13.000Z",
  "updated": "2014-11-16T21:43:13.000Z",
  "title": "Interaction between Cassiopeia A and Nearby Molecular Clouds",
  "authors": [
    "Charles D. Kilpatrick",
    "John H. Bieging",
    "George H. Rieke"
  ],
  "comment": "17 pages, 17 figures, published in ApJ",
  "journal": "C. D. Kilpatrick et al. 2014 ApJ 796 144",
  "doi": "10.1088/0004-637X/796/2/144",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present spectroscopy of the supernova remnant Cassiopeia A (Cas A) observed at infrared wavelengths from 10 - 40 micron with the Spitzer Space Telescope and at millimeter wavelengths in 12CO and 13CO J = 2 - 1 (230 and 220 GHz) with the Heinrich Hertz Submillimeter Telescope. The IR spectra demonstrate high-velocity features toward a molecular cloud coincident with a region of bright radio continuum emission along the northern shock front of Cas A. The millimeter observations indicate that CO emission is broadened by a factor of two in some clouds toward Cas A, particularly to the south and west. We believe that these features trace interactions between the Cas A shock front and nearby molecular clouds. In addition, some of the molecular clouds that exhibit broadening in CO lie 1 - 2' away from the furthest extent of the supernova remnant shock front. We propose that this material may be accelerated by ejecta with velocity significantly larger than the observed free-expansion velocity of the Cas A shock front. These observations may trace cloud interactions with fast-moving outflows such as the bipolar outflow along the southwest to northeast axis of the Cas A supernova remnant, as well as fast-moving knots seen emerging in other directions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-11-16T21:43:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nearby molecular clouds",
      "interaction",
      "cassiopeia",
      "ir spectra demonstrate high-velocity features",
      "heinrich hertz submillimeter telescope"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2014,
      "month": "Dec",
      "volume": 796,
      "number": 2,
      "pages": 144
    },
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014ApJ...796..144K"
    }
  }
}