{
  "id": "0909.5057",
  "version": "v1",
  "published": "2009-09-28T10:37:18.000Z",
  "updated": "2009-09-28T10:37:18.000Z",
  "title": "Gamma-rays from the IC $e^\\pm$ pair cascade in the radiation field of an accretion disk: Application to CenA",
  "authors": [
    "J. Sitarek",
    "W. Bednarek"
  ],
  "comment": "7 pages, 4 figures, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The very short time scale variability of TeV $\\gamma$-ray emission from active galaxies suggests that the acceleration process of particles and the production of primary $\\gamma$-rays likely occurs relatively close to the accretion disk. We calculate the $\\gamma$-ray spectra produced in an Inverse Compton $e^\\pm$ pair cascade initiated by primary $\\gamma$-rays which are injected close to the surface of the accretion disk. Possible synchrotron energy losses of secondary cascade $e^\\pm$ pairs are also taken into account. Since the soft radiation field is anisotropic, the resulting $\\gamma$-ray spectra strongly depend on the observation angle. We investigate their basic properties for different parameters describing such a model. The model is applied to the misaligned blazar Cen A recently detected in the TeV $\\gamma$-rays. We conclude on the site of the $\\gamma$-ray emission region in Cen A based on the comparison of the model with the observations of this source in the GeV-TeV energy range.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-09-28T10:37:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "accretion disk",
      "pair cascade",
      "short time scale variability",
      "gamma-rays",
      "application"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1111/j.1365-2966.2009.15785.x",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2010,
      "month": "Jan",
      "volume": 401,
      "number": 3,
      "pages": 1983
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 832388,
      "adsabs": "2010MNRAS.401.1983S"
    }
  }
}