{
  "id": "1510.07042",
  "version": "v1",
  "published": "2015-10-23T20:04:13.000Z",
  "updated": "2015-10-23T20:04:13.000Z",
  "title": "Cosmic-ray Acceleration and Propagation",
  "authors": [
    "Damiano Caprioli"
  ],
  "comment": "24 pages, 7 figures, Invited Review Talk at the 34th International Cosmic Ray Conference, The Hague, The Netherlands",
  "journal": "PoS(ICRC2015)008",
  "categories": [
    "astro-ph.HE",
    "hep-ph",
    "hep-th"
  ],
  "abstract": "The origin of cosmic rays (CRs) has puzzled scientists since the pioneering discovery by Victor Hess in 1912. In the last decade, however, modern supercomputers have opened a new window on the processes regulating astrophysical collisionless plasmas, allowing the study of CR acceleration via first-principles kinetic simulations. At the same time, a new-generation of X-ray and $\\gamma$-ray telescopes has been collecting evidence that Galactic CRs are accelerated in the blast waves of supernova remnants (SNRs). I present state-of-the-art particle-in-cells simulations of non-relativistic shocks, in which ion and electron acceleration efficiency and magnetic field amplification are studied in detail as a function of the shock parameters. I then discuss the theoretical and observational counterparts of these findings, comparing them with predictions of diffusive shock acceleration theory and with multi-wavelength observations of young SNRs. I especially outline some major open questions, such as the possible causes of the steep CR spectra inferred from $\\gamma$-ray observations of SNRs and the origin of the knee in the Galactic CR spectrum. Finally, I put such a theoretical understanding in relation with CR propagation in the Galaxy in order to bridge the gap between acceleration in sources and measurements of CRs at Earth.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-10-23T20:04:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cosmic-ray acceleration",
      "propagation",
      "regulating astrophysical collisionless plasmas",
      "major open questions",
      "steep cr spectra"
    ],
    "tags": [
      "conference paper",
      "review article",
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 24,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015arXiv151007042C",
      "inspire": 1400752
    }
  }
}