{
  "id": "astro-ph/0412410",
  "version": "v1",
  "published": "2004-12-16T11:31:04.000Z",
  "updated": "2004-12-16T11:31:04.000Z",
  "title": "Asymmetrical structure of ionization and kinematics in the Seyfert galaxy NGC 5033",
  "authors": [
    "E. Mediavilla",
    "A. Guijarro",
    "A. Castillo-Morales",
    "J. Jimenez-Vicente",
    "E. Florido",
    "S. Arribas",
    "B. Garcia-Lorenzo",
    "E. Battaner"
  ],
  "comment": "9 pages, accepted for publication in Astronomy and Astrophysics. Figures 1 and 7 are attached as .gif files",
  "doi": "10.1051/0004-6361:20034537",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We present integral field spectroscopy of NGC 5033, a low luminosity Seyfert galaxy. The observations were made with INTEGRAL, a fiber based system operating at the WHT. The intensity map of the H$\\beta$ emission line represents a spiral or ring-like pattern of HII regions. On the contrary, the [OIII] intensity map morphology is markedly anisotropic. The strong morphological differences imply that the [OIII] emitters represent highly ionized gas illuminated by the central source. The [OIII] map morphology is compatible with a biconical structure of ionization induced by strong extinction in the galaxy disc that also obscures half of the spheroidal stellar bulge. We identify the spectrum corresponding to the Seyfert 1 nucleus from the presence of H$\\beta$ broad emission lines. This spectrum is located in a region where strong extinction is expected but exhibits the bluest spectral energy distribution. The Seyfert 1 nucleus seems to be offcenter with respect to the stellar rotation center. This result has been also found in other Seyfert galaxies and interpreted in terms of a past merger. The offcentering could indicate the presence of nonsymmetric departures in the gravitational potential which could be fueling the active nucleus. The kinematics of the [OIII] emitters show important deviations at a kpc scale with respect to the stellar velocity field and show features related to the asymmetrical morphology of the high ionization region.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-12-16T11:31:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "seyfert galaxy ngc",
      "asymmetrical structure",
      "ionization",
      "represent highly ionized gas",
      "kinematics"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 667236
    }
  }
}