{
  "id": "1007.3493",
  "version": "v1",
  "published": "2010-07-20T20:00:01.000Z",
  "updated": "2010-07-20T20:00:01.000Z",
  "title": "A Galactic Center Origin for HE 0437-5439, the Hypervelocity Star near the Large Magellanic Cloud",
  "authors": [
    "Warren R. Brown",
    "Jay Anderson",
    "Oleg Y. Gnedin",
    "Howard E. Bond",
    "Margaret J. Geller",
    "Scott J. Kenyon",
    "Mario Livio"
  ],
  "comment": "5 pages, accepted in ApJ Letters",
  "journal": "Brown et al 2010, ApJ, 719, L23",
  "doi": "10.1088/2041-8205/719/1/L23",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We use Hubble Space Telescope imaging to measure the absolute proper motion of the hypervelocity star (HVS) HE 0437-5439, a short-lived B star located in the direction of the Large Magellanic Cloud (LMC). We observe (\\mu_\\alpha, \\mu_\\delta)=(+0.53+-0.25(stat)+-0.33(sys), +0.09+-0.21(stat)+-0.48(sys)) mas/yr. The velocity vector points directly away from the center of the Milky Way; an origin from the center of the LMC is ruled out at the 3-sigma level. The flight time of the HVS from the Milky Way exceeds its main-sequence lifetime, thus its stellar nature requires it to be a blue straggler. The large space velocity rules out a Galactic-disk ejection. Combining the HVS's observed trajectory, stellar nature, and required initial velocity, we conclude that HE 0437-5439 was most likely a compact binary ejected by the Milky Way's central black hole.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-07-20T20:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "large magellanic cloud",
      "galactic center origin",
      "hypervelocity star",
      "vector points directly away",
      "milky ways central black hole"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "Aug",
      "volume": 719,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 862159,
      "adsabs": "2010ApJ...719L..23B"
    }
  }
}