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T: Fachverband Teilchenphysik

T 25: Gammaastronomie 2

T 25.9: Talk

Monday, March 24, 2014, 18:45–19:00, P2

On the contribution of individual supernova remnants to the total cosmic ray spectrum — •Philipp Graeser and Julia Tjus — Ruhr-Universität Bochum, Universitätsstraße 150, D-44780 Bochum

Supernova remnants are one of the best candidate sources in order to be able to produce the observed flux of cosmic rays up to the knee or even beyond. Gamma-ray observations provide first indirect hints for hadronic acceleration: several of the gamma-ray detected SNRs are best fit by a significant contribution from the decay of neutral pions, which are produced in hadronic interactions. By analyzing the spectral energy distribution of the gamma-ray detected SNRs, an estimate of the cosmic ray flux that is present locally at the sources can be made. Starting at the source with given cosmic ray spectra, we propagate the cosmic rays through the Milky Way using the GALPROP code. In this talk, we will present first results on the contribution of those SNRs to the total cosmic ray flux and discuss implications.