{
  "id": "1112.5126",
  "version": "v1",
  "published": "2011-12-21T18:33:41.000Z",
  "updated": "2011-12-21T18:33:41.000Z",
  "title": "Warm Absorbers and Outflows in the Seyfert-1 Galaxy NGC 4051",
  "authors": [
    "Ashley L. King",
    "Jon M. Miller",
    "John Raymond"
  ],
  "comment": "21 pages, 11 Figures, Accepted to ApJ",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "We present both phenomenological and more physical photoionization models of the Chandra HETG spectra of the Seyfert-1 AGN NGC 4051. We detect 40 absorption and emission lines, encompassing highly ionized charge states from O, Ne, Mg, Si, S and the Fe L-shell and K-shell. Two independent photoionization packages, XSTAR and Cloudy, were both used to self-consistently model the continuum and line spectra. These fits detected three absorbing regions in this system with densities ranging from 10^{10} to 10^{11} cm^{-3}. In particular, our XSTAR models require three components that have ionization parameters of log \\xi = 4.5, 3.3, & 1.0, and are located within the BLR at 70, 300, and 13,000 R_g, respectively, assuming a constant wind density. Larger radii are inferred for density profiles which decline with radius. The Cloudy models give a similar set of parameters with ionization parameters of log \\xi = 5.0, 3.6, & 2.2 located at 40, 200, and 3,300 R_g. We demonstrate that these regions are out-flowing from the system, and carry a small fraction of material out of the system relative to the implied mass accretion rate. The data suggest that magnetic fields may be an important driving mechanism.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-12-21T18:33:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galaxy ngc",
      "warm absorbers",
      "ionization parameters",
      "independent photoionization packages",
      "constant wind density"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/746/1/2",
      "journal": "The Astrophysical Journal",
      "year": 2012,
      "month": "Feb",
      "volume": 746,
      "number": 1,
      "pages": 2
    },
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1082547,
      "adsabs": "2012ApJ...746....2K"
    }
  }
}