{
  "id": "1411.7413",
  "version": "v1",
  "published": "2014-11-26T22:37:47.000Z",
  "updated": "2014-11-26T22:37:47.000Z",
  "title": "Detection of persistent gamma-ray emission from SS433/W50",
  "authors": [
    "Pol Bordas",
    "Ruizhi Yang",
    "Ervin Kafexhiu",
    "Felix Aharonian"
  ],
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The microquasar SS433 features the most energetic jets known in our Galaxy. A large fraction of the jet kinetic power is delivered to the surrounding W50 nebula at the jet termination shock, from which high-energy emission and cosmic-ray production have been anticipated. Here we report on the detection of a persistent gamma-ray signal from the direction of SS433/W50 with the Fermi Large Area Telescope. The steady flux and a narrow spectral energy distribution with a maximum around 250 MeV suggest that gamma-rays are rendered by the bulk jet kinetic power through proton-proton collisions at the SS433/W50 interaction regions. If the same mechanism is operating in other baryon-loaded microquasar jets, their collective contribution may represent a significant fraction of the total galactic cosmic-ray flux at GeV energies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-11-26T22:37:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "persistent gamma-ray emission",
      "narrow spectral energy distribution",
      "fermi large area telescope",
      "total galactic cosmic-ray flux",
      "bulk jet kinetic power"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/807/1/L8",
      "journal": "The Astrophysical Journal",
      "year": 2015,
      "month": "Jul",
      "volume": 807,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1331340,
      "adsabs": "2015ApJ...807L...8B"
    }
  }
}