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      Core-collapse supernovae as cosmic ray sources

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          Abstract

          <p class="first" id="P1">Core-collapse supernovae produce fast shocks which pervade the dense circumstellar medium (CSM) of the stellar progenitor. Cosmic rays (CRs) if accelerated at these shocks can induce the growth of electromagnetic fluctuations in the foreshock medium. In this study, using a self-similar description of the shock evolution, we calculate the growth time-scales of CR-driven instabilities. We select a sample of nearby core-collapse radio supernova of type II and Ib/Ic. From radio data, we infer the parameters which enter in the calculation of the instability growth times. We find that extended IIb SNe shocks can trigger fast intra-day instabilities, strong magnetic field amplification, and CR acceleration. In particular, the non-resonant streaming instability can contribute to about 50 percent of the magnetic field intensity deduced from radio data. This results in the acceleration of CRs in the range 1–10 PeV within a few days after the shock breakout. In order to produce strong magnetic field amplification and CR acceleration, a fast shock pervading a dense CSM is necessary. In that aspect, IIn supernovæ are also good candidates. But a detailed modelling of the blast wave dynamics coupled with particle acceleration is mandatory for this class of object before providing any firm conclusions. Finally, we find that the trans-relativistic object SN 2009bb even if it produces more modest magnetic field amplification can accelerate CRs up to 2–3 PeV within 20 d after the outburst. </p>

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          Most cited references 120

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          Turbulent amplification of magnetic field and diffusive shock acceleration of cosmic rays

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            Self-similar solutions for the interaction of stellar ejecta with an external medium

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                Author and article information

                Journal
                Monthly Notices of the Royal Astronomical Society
                Oxford University Press (OUP)
                0035-8711
                1365-2966
                October 2018
                October 01 2018
                July 05 2018
                October 2018
                October 01 2018
                July 05 2018
                : 479
                : 4
                : 4470-4485
                Affiliations
                [1 ]Laboratoire Univers et Particules de Montpellier (LUPM) Université Montpellier, CNRS/IN2P3, CC72, place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
                [2 ]Department of Astronomy and Astrophysics, University of Chicago, 5640 S Ellis Ave, Chicago, IL 60637, USA
                [3 ]Centre de Sciences Nucléaires et de Sciences de la Matière, IN2P3-CNRS and Université Paris-Sud, F-91405 Orsay Cedex, France
                [4 ]Max-Planck-Institut fur Kernphysik, PO Box 103980, D-69029 Heidelberg, Germany
                Article
                10.1093/mnras/sty1743
                7735205
                33324024
                © 2018

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