{
  "id": "1007.4559",
  "version": "v1",
  "published": "2010-07-26T20:12:43.000Z",
  "updated": "2010-07-26T20:12:43.000Z",
  "title": "VLT Kinematics for omega Centauri: Further Support for a Central Black Hole",
  "authors": [
    "Eva Noyola",
    "Karl Gebhardt",
    "Markus Kissler-Patig",
    "Nora Lutzgendorf",
    "Behrang Jalali",
    "P. Tim de Zeeuw",
    "Holger Baumgardt"
  ],
  "comment": "5 pages, published in The Astrophysical Journal Letters",
  "journal": "2010, ApJL, 719, L60",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "The Galactic globular cluster omega Centauri is a prime candidate for hosting an intermediate mass black hole. Recent measurements lead to contradictory conclusions on this issue. We use VLT-FLAMES to obtain new integrated spectra for the central region of omega Centauri. We combine these data with existing measurements of the radial velocity dispersion profile taking into account a new derived center from kinematics and two different centers from the literature. The data support previous measurements performed for a smaller field of view and show a discrepancy with the results from a large proper motion data set. We see a rise in the radial velocity dispersion in the central region to 22.8+-1.2 km/s, which provides a strong sign for a central black hole. Isotropic dynamical models for omega Centauri imply black hole masses ranging from 3.0 to 5.2x10^4 solar masses depending on the center. The best-fitted mass is 4.7+-1.0x10^4 solar masses.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-07-26T20:12:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "central black hole",
      "proper motion data set",
      "vlt kinematics",
      "globular cluster omega centauri",
      "imply black hole masses"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/719/1/L60",
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "Aug",
      "volume": 719,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 863138,
      "adsabs": "2010ApJ...719L..60N"
    }
  }
}