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T: Fachverband Teilchenphysik

T 73: Cosmic Ray 4

T 73.3: Vortrag

Mittwoch, 23. März 2022, 16:45–17:00, T-H32

Influence of diffusive cosmic-ray transport on multimessenger observables — •Patrick Reichherzer^1,2,3, Julia Becker Tjus^1,2, Lukas Merten^1,2, Leander Schlegel^1,2, Julien Dörner^1,2, M.J. Pueschel^4,5, and Ellen Zweibel⁶ — ¹Theoretical Physics IV: Plasma-Astroparticle Physics, Faculty for Physics & Astronomy, Ruhr-Universität Bochum, D-44780 Bochum, Germany — ²Ruhr Astroparticle And Plasma Physics Center (RAPP Center), Bochum, Germany — ³University Paris-Saclay, France — ⁴Dutch Institute for Fundamental Energy Research, 5612 AJ Eindhoven, The Netherlands — ⁵Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands — ⁶Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, U.S.A.

Cosmic-ray transport in astrophysical environments is often dominated by diffusion in a magnetic field with a turbulent component. The diffusion properties of charged particles directly influence observable properties, such as the spectrum of cosmic rays and their secondaries produced in interactions. In many diffusion scenarios, the simplified assumption of fully resonant Kolmogorov diffusion in the quasi-linear limit results in a parallel diffusion coefficient D∝ E^1/3. A quantitative investigation of the scattering regimes, however, shows that the diffusion coefficient tensor can deviate significantly from this behaviour. In this talk, the complex dependencies of charged particle diffusion on the turbulence level of the magnetic field are presented. Examples of how this affects observational signatures will be shown in the context of galaxies or the transient sky, i.e., flaring Blazars.