Abstract
We perform Monte Carlo simulations of transrelativistic shear acceleration dedicated to a jet-cocoon system of active galactic nuclei. A certain fraction of galactic cosmic rays in a halo is entrained, and sufficiently high-energy particles can be injected to the reacceleration process and further accelerated up to 100 EeV. We show that the shear reacceleration mechanism leads to a hard spectrum of escaping cosmic rays, dLE/dE∞E-1-E0, distinct from a conventional E-2 spectrum. The supersolar abundance of ultrahigh-energy nuclei is achieved due to injections at TeV-PeV energies. As a result, we find that the highest-energy spectrum and mass composition can be reasonably explained by our model without contradictions with the anisotropy data.
Original language | English (US) |
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Article number | 023026 |
Journal | Physical Review D |
Volume | 97 |
Issue number | 2 |
DOIs | |
State | Published - Jan 29 2018 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)