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T: Fachverband Teilchenphysik
T 104: Neutrino Astronomy V
T 104.6: Vortrag
Freitag, 20. März 2026, 10:15–10:30, KS H C
Expanding Stochastic Acceleration in the AGN Corona — •Marc Hubert1,2, Björn Eichmann1,2, and Julia Becker Tjus1,2,3 — 1Theoretical Physics IV: Plasma Astroparticle Physics, Ruhr University Bochum, Germany — 2RAPP Center, Bochum, Germany — 3Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden
In the field of astroparticle physics, understanding the mechanisms responsible for the acceleration of charged particles in astrophysical environments is of central interest. The so-called Fermi-II process describes stochastic acceleration in turbulent magnetic fields. Previous studies have presented a semianalytical solution of the isotropic steady-state momentum-diffusion equation that includes continuous and catastrophic momentum changes for weak magnetic turbulence constrained to a finite range. Within this framework, the solution is valid only in the momentum interval in which interactions with the turbulence occur. In my master thesis, I aim to extend this framework to lower momenta and to investigate how pre-acceleration processes, e.g. magnetic reconnection, affect the resulting particle spectra. Furthermore, I apply the extended model to the AGN corona in NGC 1068 and examine the compatibility of the predicted neutrino flux with current observations. In this talk, I present first results, including the extension to lower momenta and the influence of pre-acceleration processes.
Keywords: Stochastic acceleration; Momentum diffusion; AGN corona