{
  "id": "1008.1840",
  "version": "v2",
  "published": "2010-08-11T06:42:32.000Z",
  "updated": "2010-09-30T05:28:58.000Z",
  "title": "Gamma-ray Emission from Crushed Clouds in Supernova Remnants",
  "authors": [
    "Yasunobu Uchiyama",
    "Roger Blandford",
    "Stefan Funk",
    "Hiroyasu Tajima",
    "Takaaki Tanaka"
  ],
  "comment": "5 pages, 2 figures, minor modifications made in Introduction and Discussion, accepted for publication in ApJL",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "It is shown that the radio and gamma-ray emission observed from newly-found \"GeV-bright\" supernova remnants (SNRs) can be explained by a model, in which a shocked cloud and shock-accelerated cosmic rays (CRs) frozen in it are simultaneously compressed by the supernova blastwave as a result of formation of a radiative cloud shock. Simple reacceleration of pre-existing CRs is generally sufficient to power the observed gamma-ray emission through the decays of neutral pions produced in hadronic interactions between high-energy protons (nuclei) and gas in the compressed-cloud layer. This model provides a natural account of the observed synchrotron radiation in SNRs W51C, W44 and IC 443 with flat radio spectral index, which can be ascribed to a combination of secondary and reaccelerated electrons and positrons.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-09-30T05:28:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gamma-ray emission",
      "supernova remnants",
      "crushed clouds",
      "flat radio spectral index",
      "shock-accelerated cosmic rays"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/723/1/L122",
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "Nov",
      "volume": 723,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 864966,
      "adsabs": "2010ApJ...723L.122U"
    }
  }
}