{
  "id": "1904.03095",
  "version": "v1",
  "published": "2019-04-05T14:43:01.000Z",
  "updated": "2019-04-05T14:43:01.000Z",
  "title": "Detection of a double-peaked H$α$ component from the accretion disc of NGC 4958",
  "authors": [
    "T. V. Ricci",
    "J. E. Steiner"
  ],
  "comment": "9 pages, 4 figures, 3 tables, accepted for publication in MNRAS",
  "doi": "10.1093/mnras/stz919",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "Active Galactic Nuclei are objects associated with the presence of an accretion disc around supermassive black holes found in the very central region of galaxies with a well-defined bulge. In the optical range of the spectrum, a possible signature of the accretion disc is the presence of a broad double-peaked component that is mostly seen in H$\\alpha$. In this paper, we report the detection of a double-peaked feature in the H$\\alpha$ line in the nucleus of the galaxy NGC 4958. The narrow line region of this object has an emission that is typical of a LINER galaxy, which is the usual classification for double-peaked emitters. A central broad component, related to the broad line region (BLR) of this object, is seen in H$\\alpha$ and also in H$\\beta$. We concluded that the double-peaked emission is emitted by a circular relativistic Keplerian disc with an inner radius $\\xi_{\\rm i}$ = 570$\\pm$ 83, an outer radius $\\xi_{\\rm o}$ = 860$\\pm$170 (both in units of $GM_{\\rm SMBH}/c^2$), an inclination to the line of sight $i$ = 27.2$^o \\pm$0.7$^o$ and a local broadening parameter $\\sigma$ = 1310$\\pm$70 km s$^{-1}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-04-05T14:43:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "accretion disc",
      "circular relativistic keplerian disc",
      "broad line region",
      "central broad component",
      "narrow line region"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}