Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 92: Kosmische Strahlung VII

T 92.9: Talk

Thursday, March 12, 2015, 18:45–19:00, I.13.65 (HS 26)

Gamma-ray emitting supernova remnants as the origin of Galactic cosmic rays — •Mike Kroll, Julia Tjus, Björn Eichmann, and Nils Nierstenhöfer — Ruhr-Universität Bochum, Bochum, Deutschland

It is generally believed that the cosmic ray spectrum below the knee is of Galactic origin, although the exact sources making up the entire cosmic ray energy budget are still unknown. Including effects of magnetic amplification, Supernova Remnants (SNR) could be capable of accelerating cosmic rays up to a few PeV and they represent the only source class with a sufficient non-thermal energy budget to explain the cosmic ray spectrum up to the knee. Now, gamma-ray measurements of SNRs for the first time allow to derive the cosmic ray spectrum at the source, giving us a first idea of the concrete, possible individual contributions to the total cosmic ray spectrum. In this contribution, we use these features as input parameters for propagating cosmic rays from its origin to Earth using GALPROP in order to investigate if these supernova remnants reproduce the cosmic ray spectrum and if supernova remnants in general can be responsible for the observed energy budget.