Cosmic-ray acceleration and escape from supernova remnants

A. R. Bell*, K. M. Schure, B. Reville, G. Giacinti

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Galactic cosmic-ray (CR) acceleration to the knee in the spectrum at a few PeV is only possible if the magnetic field ahead of a supernova remnant (SNR) shock is strongly amplified by CRs escaping the SNR. A model formulated in terms of the electric charge carried by escaping CRs predicts the maximum CR energy and the energy spectrum of CRs released into the surrounding medium. We find that historical SNRs such as Cas A, Tycho and Kepler may be expanding too slowly to accelerate CRs to the knee at the present time.

Original languageEnglish
Pages (from-to)415-429
JournalMonthly Notices of the Royal Astronomical Society
Volume431
Issue number1
DOIs
Publication statusPublished - May 2013

Keywords

  • ISM: supernova remnants
  • shock waves
  • DIFFUSIVE SHOCK ACCELERATION
  • PARTICLE-ACCELERATION
  • ASTROPHYSICAL SHOCKS
  • acceleration of particles
  • MAGNETIC-FIELD AMPLIFICATION
  • magnetic fields
  • cosmic rays
  • HIGH-ENERGY
  • STREAMING INSTABILITY
  • NONLINEAR AMPLIFICATION
  • LASER-PRODUCED PLASMAS
  • WAVE DISSIPATION
  • BOLTZMANN-EQUATION

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