{
  "id": "1903.02756",
  "version": "v1",
  "published": "2019-03-07T07:33:25.000Z",
  "updated": "2019-03-07T07:33:25.000Z",
  "title": "Origin of Cosmic Ray Electrons and Positrons",
  "authors": [
    "Shi Zhao-Dong",
    "Liu Siming"
  ],
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "With experimental results of AMS on the spectra of cosmic ray (CR) $e^{-}$, $e^{+}$, $e^{-}+e^{+}$ and positron fraction, as well as new measurements of CR $e^{-}+e^{+}$ flux by HESS, one can better understand the CR lepton ($e^{-}$ and $e^{+}$) spectra and the puzzling electron-positron excess above $\\sim$10 GeV. In this article, spectra of CR $e^{-}$ and $e^{+}$ are fitted with a physically motivated simple model, and their injection spectra are obtained with a one-dimensional propagation model including the diffusion and energy loss processes. Our results show that the electron-positron excess can be attributed to uniformly distributed sources that continuously inject into the galactic disk electron-positron with a power-law spectrum cutting off near 1 TeV and a triple power-law model is needed to fit the primary CR electron spectrum. The lower energy spectral break can be attributed to propagation effects giving rise to a broken power-law injection spectrum of primary CR electrons with a spectral hardening above $\\sim$40 GeV.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-03-07T07:33:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cosmic ray electrons",
      "lower energy spectral break",
      "primary cr electron spectrum",
      "broken power-law injection spectrum",
      "electron-positron excess"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}