Cosmic Ray Origins in Supernova Blast Waves

Abstract

We extend the self-similar solution derived by Chevalier for a Sedov blast wave accelerating cosmic rays (CR) to show that the Galactic CR population can be divided into: (A) CR with energies above ~200GeV released upstream during CR acceleration by supernova remnants (SNR), (B) CR advected into the interior of the SNR during expansion and then released from the SNR at the end of its life to provide the Galactic CR component below ~200GeV. The intersection between the two populations may correspond to a measured change in the Galactic CR spectral index at this energy.

12 pages, 8 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (8)

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• Giant Magnetized Outflows from the Centre of the Milky Way
• Origin of the Cosmic Ray Spectral Hardening
• Diffusive Shock Acceleration with Magnetic Amplification by Non-resonant Streaming Instability in SNRs
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• Simulating TeV gamma-ray morphologies of shell-type supernova remnants
• Modeling the gamma-ray emission in the Galactic Center with a fading cosmic-ray accelerator
• Studying the link between radio galaxies and AGN fuelling with relativistic hydrodynamic simulations of flickering jets
• Supernova Remnant-Cosmic Ray connection: a modern view