Spectrum of Galactic Cosmic Rays Accelerated in Supernova Remnants
V.S.Ptuskin, V.N.Zirakashvili, E.S.Seo
TL;DR
This paper models the spectra of cosmic rays accelerated by supernova remnants, considering magnetic field effects, and finds that these processes can produce cosmic rays up to ultra-high energies consistent with observations.
Contribution
It introduces a comprehensive calculation of cosmic ray spectra from supernova remnants including magnetic amplification and Alfvenic drift effects, extending predictions to ultra-high energies.
Findings
Maximum energy for Fe ions reaches 5×10^{18} eV in Type IIb SNRs.
Predicted cosmic ray spectra align well with Earth measurements.
Magnetic field amplification significantly influences acceleration limits.
Abstract
The spectra of high-energy protons and nuclei accelerated by supernova remnant shocks are calculated taking into account magnetic field amplification and Alfvenic drift both upstream and downstream of the shock for different types of supernova remnants during their evolution. The maximum energy of accelerated particles may reach eV for Fe ions in Type IIb SNRs. The calculated energy spectrum of cosmic rays after propagation through the Galaxy is in good agreement with the spectrum measured at the Earth.
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