{
  "id": "1611.06644",
  "version": "v1",
  "published": "2016-11-21T04:01:48.000Z",
  "updated": "2016-11-21T04:01:48.000Z",
  "title": "Discovery of Gamma-Ray Emission from the X-shaped Bulge of the Milky Way",
  "authors": [
    "Oscar Macias",
    "Chris Gordon",
    "Roland M. Crocker",
    "Brendan Coleman",
    "Dylan Paterson",
    "Shunsaku Horiuchi",
    "Martin Pohl"
  ],
  "comment": "21 pages, 7 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "An anomalous signal has been found in Fermi Gamma-Ray Large Area Telescope data covering the center of the Galaxy. Given its morphological and spectral characteristics, this \"Galactic Center Excess\" is ascribable to self-annihilation of dark matter particles. We report on an analysis that exploits hydrodynamical modeling to register the position of interstellar gas associated with diffuse Galactic $\\gamma$-ray emission. Our improved analysis reveals that the excess $\\gamma$-rays are spatially correlated with both the X-shaped stellar over-density in the Galactic bulge and the nuclear stellar bulge. Given these correlations, we argue that the excess is not a dark matter phenomenon but rather associated with the stellar population of the X-bulge and the nuclear bulge.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-11-21T04:01:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "milky way",
      "gamma-ray emission",
      "x-shaped bulge",
      "area telescope data covering",
      "gamma-ray large area telescope data"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}