http://arxiv.org/abs/1405.5281
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 positrons and secondary nuclei and show that the measured boron-to-carbon and positron-to-electron ratios are consistent with the significant SNR contribution.
E. Berezhko and L. Ksenofontov
Thu, 22 May 14
28/48
Comments: 4 pages, 3 figures
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