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2010

Antimatter spectra from a time-dependent modeling of supernova remnants

Kachelriess, M., Ostapchenko, S., Tomas, R.

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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.

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