Berlin 2014 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 1: Astrophysik

EP 1.2: Vortrag

Montag, 17. März 2014, 14:30–14:45, DO24 1.103

Evidence for the Stochastic Acceleration in Supernova Remnants — •Alina Wilhelm^1,2 and Igor Telezhinsky¹ — ¹Desy, Zeuthen, Deutschland — ²Universität Potsdam, Deutschland

Observationally deduced particle spectra in Supernova Remnants (SNR) often do not fit to expectations based on cosmic-ray modified Diffusive Shock Acceleration theory. Here we are concerned with the Second Order Fermi Acceleration process; we discuss its benefits and argue why introducing such a mechanism is the most natural solution. We solve the full transport equation for cosmic rays in the test-particle regime and investigate the consequences of Stochastic Acceleration. We infer that Second Order Fermi Acceleration strongly modifies the particle spectrum and that its contribution is sufficient to generate the observed radio emission flux. We therefore conclude that Stochastic Acceleration is an essential part of the particle dynamics in SNR.