Antiprotons Produced in Supernova Remnants

Abstract

We present the energy spectrum of antiproton cosmic ray (CR) component calculated on the basis of the nonlinear kinetic model of CR production in supernova remnants (SNR). The model includes reacceleration of already existing in interstellar medium antiprotons as well as creation of antiprotons in nuclear collisions of accelerated protons with gas nuclei and their subsequent acceleration by SNR shock. It is shown that antiprotons production in SNRs produces considerable effect in their resultant energy spectrum making it essentially flatter above 10 GeV so that the spectrum at TeV-energies increases by a factor of five. Calculated antiproton spectrum is well consistent with the PAMELA data, which correspond to energies below 100 GeV. As a consistency check we have also calculated within the same model the energy spectra of secondary nuclei and show that the measured boron-to-carbon ratio is consistent with the significant SNR contribution.

4 pages, 2 figures, Accepted by ApJL

References in corpus (4)

• Spectrum of cosmic rays, produced in supernova remnants
• Variation of cosmic ray injection across supernova shocks
• Cosmic ray production in supernova remnants including reacceleration: the secondary to primary ratio
• Secondary Cosmic Ray Nuclei from Supernova Remnants and Constraints to the Propagation Parameters

Cited by in corpus (5)

• Indications for a high-rigidity break in the cosmic-ray diffusion coefficient
• Antiproton signatures from astrophysical and dark matter sources at the galactic center
• Origin of Galactic Cosmic Rays from Supernova Remnants
• Particle acceleration in a shock wave propagating to an inhomogeneous medium
• Origin of hardening and universality of cosmic rays spectra in GV-PV rigidity region