{
  "id": "1708.00066",
  "version": "v1",
  "published": "2017-07-31T20:38:15.000Z",
  "updated": "2017-07-31T20:38:15.000Z",
  "title": "HESS J0632+057: hydrodynamics and nonthermal emission",
  "authors": [
    "Valentí Bosch-Ramon",
    "Maxim V. Barkov",
    "Andrea Mignone",
    "Pol Bordas"
  ],
  "comment": "6 pages, 5 figures, accepted by MNRAS Letters",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "HESS J0632+057 is an eccentric gamma-ray Be binary that produces non-thermal radio, X-rays, GeV, and very high-energy gamma rays. The non-thermal emission of HESS J0632+057 is modulated with the orbital period, with a dominant maximum before apastron passage. The nature of the compact object in HESS J0632+057 is not known, although it has been proposed to be a young pulsar as in PSR B1259-63, the only gamma-ray emitting high-mass binary known to host a non-accreting pulsar. In this Letter, we present hydrodynamical simulations of HESS J0632+057 in the context of a pulsar and a stellar wind interacting in an eccentric binary, and propose a scenario for the non-thermal phenomenology of the source. In this scenario, the non-thermal activity before and around apastron is linked to the accumulation of non-thermal particles in the vicinity of the binary, and the sudden drop of the emission before apastron is produced by the disruption of the two-wind interaction structure, allowing these particles to efficiently escape. In addition to providing a framework to explain the non-thermal phenomenology of the source, this scenario predicts extended, moving X-ray emitting structures similar to those observed in PSR B1259-63.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-07-31T20:38:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nonthermal emission",
      "hydrodynamics",
      "non-thermal phenomenology",
      "moving x-ray emitting structures similar",
      "two-wind interaction structure"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}