{
  "id": "1809.03074",
  "version": "v1",
  "published": "2018-09-10T01:22:34.000Z",
  "updated": "2018-09-10T01:22:34.000Z",
  "title": "Constraining the population of intermediate mass black holes by gamma-ray data of the Fornax cluster",
  "authors": [
    "Man Ho Chan"
  ],
  "comment": "Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Recent studies of merging black holes suggest that the cosmological mass fraction of primordial black holes (PBHs) is not completely negligible. The mass of a PBH can be as massive as an intermediate mass black hole (IMBH). In this article, we assume that dark matter particles are thermal relic particles and they can self-annihilate. The dark matter around an IMBH may have formed a density spike so that the rate of dark matter annihilation would be greatly enhanced. Using the gamma-ray data of the Fornax cluster and assuming merging events in the cluster are not important, we show that the amount of IMBHs (including PBHs) is very sub-dominant compared with the amount of baryons and dark matter. The upper limit on the IMBH-to-baryon ratio is $\\sim 7\\times 10^{-4}$ for $m_{\\rm DM} \\le 10$ TeV.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-09-10T01:22:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "intermediate mass black hole",
      "gamma-ray data",
      "fornax cluster",
      "population",
      "thermal relic particles"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}