{
  "id": "1709.00131",
  "version": "v1",
  "published": "2017-09-01T01:50:55.000Z",
  "updated": "2017-09-01T01:50:55.000Z",
  "title": "Search for the Gamma-ray Emission from M33 with Fermi LAT",
  "authors": [
    "Fu Lei",
    "Xia Zi-qin",
    "Shen Zhao-qiang"
  ],
  "comment": "11 pages, 4 figures",
  "journal": "2017MNRAS.471.1737F",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "In the work we search for the $\\gamma$-ray signal from M33, one of the biggest galaxies in the Local Group, by using the Pass 8 data of Fermi Large Area Telescope (LAT). No statistically significant gamma-ray emission has been detected in the direction of M33 and we report a new upper limit of high energy ($>100\\,\\rm MeV$) photon flux of $2.3\\times 10^{-9}\\,\\rm ph\\,cm^{-2}\\,s^{-1}$, which is more strict than previous constrains and implies a cosmic ray density of M33 lower than that speculated previously. Nevertheless the current limit is still in agreement with the correlation of star formation rate and $\\gamma$-ray luminosity inferred from the Local group galaxies and a few nearby starburst galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-09-01T01:50:55.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fermi lat",
      "fermi large area telescope",
      "nearby starburst galaxies",
      "local group galaxies",
      "star formation rate"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}