{
  "id": "0903.3468",
  "version": "v1",
  "published": "2009-03-20T08:46:08.000Z",
  "updated": "2009-03-20T08:46:08.000Z",
  "title": "Internal Kinematics and Stellar Populations of the Poststarburst+AGN Galaxy SDSS J230743.41+152558.4",
  "authors": [
    "I. Chilingarian",
    "S. De Rijcke",
    "P. Buyle"
  ],
  "comment": "accepted for publication by Astrophysical Journal Letters, 9 pages, 4 figures",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the first 3D spectroscopic observations of a nearby HI detected poststarburst, or E+A, galaxy, SDSS J230743.41+152558.4, obtained with the VIMOS IFU spectrograph at ESO VLT. Using the NBursts full spectral fitting technique, we derive maps of stellar kinematics, age, and metallicity out to 2-3 half-light radii. Our analysis reveals a large-scale rapidly rotating disc (v_circ = 300km/s) with a positive age gradient (0.6 to 1.5 Gyr), and a very metal-rich central region ([Fe/H]=+0.25 dex). If a merger or interaction is responsible for triggering the starburst, the presence of this undisturbed disc suggests a minor merger with a gas-rich satellite as the most plausible option, rather than a disruptive major merger. We find spectroscopic evidence for the presence of a LINER or AGN. This is an important clue to the feedback mechanism that truncated the starburst. The presently observed quiescent phase may well be a temporary episode in the galaxy's life. SDSS J230743.41+152558.4 is gas-rich and may restart forming stars, again becoming blue before finally settling at the red sequence.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-03-20T08:46:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "internal kinematics",
      "galaxy sdss",
      "stellar populations",
      "nbursts full spectral fitting technique",
      "first 3d spectroscopic observations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/697/2/L111",
      "journal": "The Astrophysical Journal",
      "year": 2009,
      "month": "Jun",
      "volume": 697,
      "number": 2
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 815894,
      "adsabs": "2009ApJ...697L.111C"
    }
  }
}