{
  "id": "1508.01457",
  "version": "v1",
  "published": "2015-08-06T17:02:06.000Z",
  "updated": "2015-08-06T17:02:06.000Z",
  "title": "Pulsar Wind Nebulae as a source of the observed electron and positron excess at high energy: the case of Vela-X",
  "authors": [
    "S. Della Torre",
    "M. Gervasi",
    "P. G. Rancoita",
    "D. Rozza",
    "A. Treves"
  ],
  "comment": "Accepted for publication in Journal of High Energy Astrophysics (2015)",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We investigate, in terms of production from pulsars and their nebulae, the cosmic ray positron and electron fluxes above $\\sim10$ GeV, observed by the AMS-02 experiment up to 1 TeV. We concentrate on the Vela-X case. Starting from the gamma-ray photon spectrum of the source, generated via synchrotron and inverse Compton processes, we estimated the electron and positron injection spectra. Several features are fixed from observations of Vela-X and unknown parameters are borrowed from the Crab nebula. The particle spectra produced in the pulsar wind nebula are then propagated up to the Solar System, using a diffusion model. Differently from previous works, the omnidirectional intensity excess for electrons and positrons is obtained as a difference between the AMS-02 data and the corresponding local interstellar spectrum. An equal amount of electron and positron excess is observed and we interpreted this excess (above $\\sim$100 GeV in the AMS-02 data) as a supply coming from Vela-X. The particle contribution is consistent with models predicting the gamma-ray emission at the source. The input of a few more young pulsars is also allowed, while below $\\sim$100 GeV more aged pulsars could be the main contributors.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-08-06T17:02:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pulsar wind nebula",
      "positron excess",
      "high energy",
      "positron injection spectra",
      "gamma-ray photon spectrum"
    ],
    "publication": {
      "doi": "10.1016/j.jheap.2015.08.001",
      "journal": "Journal of High Energy Astrophysics",
      "year": 2015,
      "month": "Dec",
      "volume": 8,
      "pages": 27
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015JHEAp...8...27D",
      "inspire": 1386837
    }
  }
}