{
  "id": "1406.7252",
  "version": "v1",
  "published": "2014-06-27T18:01:55.000Z",
  "updated": "2014-06-27T18:01:55.000Z",
  "title": "Ultra-fast outflows in radio-loud active galactic nuclei",
  "authors": [
    "F. Tombesi",
    "F. Tazaki",
    "R. F. Mushotzky",
    "Y. Ueda",
    "M. Cappi",
    "J. Gofford",
    "J. N. Reeves",
    "M. Guainazzi"
  ],
  "comment": "Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Recent X-ray observations show absorbing winds with velocities up to mildly-relativistic values of the order of ~0.1c in a limited sample of 6 broad-line radio galaxies. They are observed as blue-shifted Fe XXV-XXVI K-shell absorption lines, similarly to the ultra-fast outflows (UFOs) reported in Seyferts and quasars. In this work we extend the search for such Fe K absorption lines to a larger sample of 26 radio-loud AGNs observed with XMM-Newton and Suzaku. The sample is drawn from the Swift BAT 58-month catalog and blazars are excluded. X-ray bright FR II radio galaxies constitute the majority of the sources. Combining the results of this analysis with those in the literature we find that UFOs are detected in >27% of the sources. However, correcting for the number of spectra with insufficient signal-to-noise, we can estimate that the incidence of UFOs is this sample of radio-loud AGNs is likely in the range f=(50+/-20)%. A photo-ionization modeling of the absorption lines with XSTAR allows to estimate the distribution of their main parameters. The observed outflow velocities are broadly distributed between v_out<1,000 km s^-1 and v_out~0.4c, with mean and median values of v_out~0.133c and v_out~0.117c, respectively. The material is highly ionized, with an average ionization parameter of log\\xi~4.5 erg s^-1 cm, and the column densities are larger than N_H > 10^22 cm^-2. Overall, these characteristics are consistent with the presence of complex accretion disk winds in a significant fraction of radio-loud AGNs and demonstrate that the presence of relativistic jets does not preclude the existence of winds, in accordance with several theoretical models.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-06-27T18:01:55.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio-loud active galactic nuclei",
      "ultra-fast outflows",
      "radio-loud agns",
      "fe xxv-xxvi k-shell absorption lines",
      "blue-shifted fe xxv-xxvi k-shell absorption"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnras/stu1297",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2014,
      "month": "Sep",
      "volume": 443,
      "number": 3,
      "pages": 2154
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1303521,
      "adsabs": "2014MNRAS.443.2154T"
    }
  }
}