Antimatter spectra from a time-dependent modeling of supernova remnants

Details Antimatter spectra from a time-dependent modeling of supernova remnants Antimatter spectra from a time-dependent modeling of supernova remnants

2010-04-07

arxiv.org/abs/1004.1118v2

J.Phys.Conf.Ser.259:012092,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 4 eps figures; v2: results for time-dependent magnetic field added

Scientific paper

10.1088/1742-6596/259/1/012092

We calculate the energy spectra of cosmic rays (CR) and their secondaries produced in a supernova remnant (SNR), taking into account the time-dependence of the SNR shock. We model the trajectories of charged particles as a random walk with a prescribed diffusioncoefficient, accelerating the particles at each shock crossing. Secondary production by CRs colliding with gas is included as a Monte Carlo process. We find that SNRs produce less antimatter than suggested previously: The positron/electron ratio and the antiproton/proton ratio are a few percent and few $\times 10^{-5}$, respectively. Both ratios do not rise with energy.

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