{
  "id": "2012.14872",
  "version": "v1",
  "published": "2020-12-29T17:51:20.000Z",
  "updated": "2020-12-29T17:51:20.000Z",
  "title": "The Carina Nebula and Gum 31 molecular complex III: The distribution of the 1-3 GHz radio continuum across the whole nebula",
  "authors": [
    "David Rebolledo",
    "Anne J. Green",
    "Michael G. Burton",
    "Shari L. Breen",
    "Guido Garay"
  ],
  "comment": "18 pages, 16 Figures, 1 appendix",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We report the most detailed $1-3$ GHz radio continuum emission map of the nearest region of massive star formation, the Carina Nebula. As part of a large program with the Australia Telescope Compact Array, we have covered $\\sim$ 12 deg$^2$, achieving an angular resolution of $\\sim$ 16 arcsec, representing the largest and most complete map of the radio continuum to date. Our continuum map shows a spectacular and complex distribution of emission across the nebula, with multiple structures such as filaments, shells, and fronts across a wide range of size scales. The ionization fronts have advanced far into the southern and northern region of the Galactic Plane, as fronts are clearly detected at distances $\\sim$ 80 pc from the stellar clusters in the center. We estimated an ionization photon luminosity $Q_\\mathrm{H}=(7.8 \\pm 0.8) \\times 10^{50}$ s$^{-1}$ which corresponds to $\\sim 85\\%$ of the total value obtained from stellar population studies. Thus, approximately $15\\%$ of the ionizing flux has escaped from the nebula into the diffuse Galactic Interstellar Medium. Comparison between radio continuum and the hydrogen atomic and molecular gas maps offers a clear view of the bipolar outflow driven by the energy released by the massive stellar clusters that also affects the fraction of molecular gas across the nebula. Comparison between 8$\\mu$m and 70$\\mu$m emission maps and the radio continuum reveals how the hot gas permeates through the molecular cloud, shapes the material into features such as pillars, small shells and arc-like structures, and ultimately, escapes.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-12-29T17:51:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "carina nebula",
      "molecular complex",
      "ghz radio continuum emission map",
      "distribution",
      "stellar clusters"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}