{
  "id": "astro-ph/0307209",
  "version": "v2",
  "published": "2003-07-10T13:12:14.000Z",
  "updated": "2003-11-17T11:34:00.000Z",
  "title": "On Dark Matter Annihilation in the Local Group",
  "authors": [
    "Lidia Pieri",
    "Enzo Branchini"
  ],
  "comment": "11 pages, 10 figures. Accepted for publication in Phys. Rev. D.; added a new paragraph on the detectability of Galactic sub-halos in our Galaxy; added a discussion on their model dependence. The relation of our results with the \"CDM crisis\" issue has also been added",
  "journal": "Phys.Rev.D69:043512,2004",
  "doi": "10.1103/PhysRevD.69.043512",
  "categories": [
    "astro-ph",
    "hep-ph"
  ],
  "abstract": "Under the hypothesis of a Dark Matter composed by supersymmetric particles like neutralinos, we investigate the possibility that their annihilation in the haloes of nearby galaxies could produce detectable fluxes of $\\gamma$-photons. Expected fluxes depend on several, poorly known quantities such as the density profiles of Dark Matter haloes, the existence and prominence of central density cusps and the presence of a population of sub-haloes. We find that, for all reasonable choices of Dark Matter halo models, the intensity of the $\\gamma$-ray flux from some of the nearest extragalactic objects, like M31, is comparable or higher than the diffuse Galactic foreground. We show that next generation ground-based experiments could have the sensitivity to reveal such fluxes which could help us unveiling the nature of Dark Matter particles.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-11-17T11:34:00.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "98.70.Rz",
      "98.56.-p",
      "95.35.+d"
    ],
    "keywords": [
      "dark matter annihilation",
      "local group",
      "dark matter halo models",
      "nearest extragalactic objects",
      "dark matter particles"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 623177
    }
  }
}