{
  "id": "2109.07823",
  "version": "v1",
  "published": "2021-09-16T09:30:38.000Z",
  "updated": "2021-09-16T09:30:38.000Z",
  "title": "Probing the hadronic nature of the gamma-ray emission associated with Westerlund 2",
  "authors": [
    "Emma de Ona Wilhelmi",
    "Enrique Mestre",
    "Diego F. Torres",
    "Tim Lukas Holch",
    "Ullrich Schwanke",
    "Felix Aharonian",
    "Pablo Saz Parkinson",
    "Ruizhi Yang",
    "Roberta Zanin"
  ],
  "comment": "Proceeding for contribution to the 37th International Cosmic Ray Conference (ICRC2021)",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Star-forming regions have been proposed as potential Galactic cosmic-ray accelerators for decades. Cosmic ray acceleration can be probed through observations of gamma-rays produced in inelastic proton-proton collisions, at GeV and TeV energies. We analyze more than 11 years of Fermi-LAT data from the direction of Westerlund 2, one of the most massive and best-studied star-forming regions in our Galaxy. The spectral and morphological characteristics of the LAT source agree with the ones in the TeV regime (HESS J1023-575), allowing the description of the gamma-ray source from a few hundreds of MeV to a few tens of TeVs. We will present the results and discuss the implications of the identification with the stellar cluster and the radiation mechanism involved.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-09-16T09:30:38.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gamma-ray emission",
      "hadronic nature",
      "westerlund",
      "potential galactic cosmic-ray accelerators",
      "cosmic ray acceleration"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}