{
  "id": "1804.10197",
  "version": "v1",
  "published": "2018-04-26T17:52:14.000Z",
  "updated": "2018-04-26T17:52:14.000Z",
  "title": "A hypervelocity star with a Magellanic origin",
  "authors": [
    "Denis Erkal",
    "Douglas Boubert",
    "Alessia Gualandris",
    "N. Wyn Evans",
    "Fabio Antonini"
  ],
  "comment": "7 pages, 9 figures. Submitted to MNRAS. Comments welcome!",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Using proper motion measurements from Gaia DR2, we probe the origin of 26 previously known hypervelocity stars (HVSs) around the Milky Way. We find that a significant fraction of these stars have a high probability of originating close to the Milky Way centre, but there is one obvious outlier. HVS3 is highly likely to be coming almost from the centre of the Large Magellanic Cloud (LMC). During its closest approach, $21.1^{+6.1}_{-4.6}$ Myr ago, it had a relative velocity of $870^{+69}_{-66}$ kms$^{-1}$ with respect to the LMC. This large kick velocity is only consistent with the Hills mechanism, requiring a massive black hole at the centre of the LMC. This provides strong direct evidence that the LMC itself harbours a massive black hole of at least $4\\times 10^3 -10^4 M_\\odot$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-04-26T17:52:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hypervelocity star",
      "magellanic origin",
      "massive black hole",
      "strong direct evidence",
      "large kick velocity"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}