{
  "id": "1509.01433",
  "version": "v1",
  "published": "2015-09-04T13:01:31.000Z",
  "updated": "2015-09-04T13:01:31.000Z",
  "title": "Role of the disk environment in the gamma-ray emission from the binary system PSR B1259-63/LS 2883",
  "authors": [
    "Iurii Sushch",
    "Markus Böttcher"
  ],
  "comment": "9 pages, 2 figures. In Proceedings of the 34th International Cosmic Ray Conference (ICRC2015)",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "PSR B1259-63/LS 2883 is a very high energy (VHE; E > 100 GeV) gamma-ray emitting binary consisting of a 48 ms pulsar orbiting around a Be star with a period of 3.4 years. The Be star features a circumstellar disk which is inclined with respect to the orbit in such a way that the pulsar crosses it twice every orbit. The circumstellar disk provides an additional field of target photons which may contribute to inverse Compton scattering and gamma-gamma absorption, leaving a characteristic imprint in the observed spectrum and light curve of the high energy emission. We study the signatures of Compton-supported, VHE gamma-ray induced pair cascades in the circumstellar disc of the Be star and their possible contribution to the GeV flux. We also study a possible impact of the gamma-gamma absorption in the disk on the observed TeV light curve. We show that the cumulative absorption of VHE gamma-rays in stellar and disk photon fields can explain the modulation of the flux at the periastron passage.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-09-04T13:01:31.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "binary system psr",
      "gamma-ray emission",
      "disk environment",
      "high energy",
      "vhe gamma-ray induced pair cascades"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1391779
    }
  }
}