Göttingen 2025 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 14: Astrophysics II

EP 14.5: Talk

Friday, April 4, 2025, 12:00–12:15, ZHG101

Relativistic test-particle transport and acceleration in MHD jets — •Patrick Günther, Karl Mannheim, and Sarah M. Wagner — Julius-Maximilians-Universität Würzburg

Extragalactic jets show continuum emission across the entire electromagnetic spectrum and variability on all observed timescales. Modelling this non-thermal emission can be achieved by simultaneously describing the kinetics of relativistic particles and the fluid-dynamical bulk plasma in the jet. We solve a time-dependent transport equation by means of stochastic differential equations, which describes the propagation of particles in the background of a MHD-simulated jet and includes effects such as diffusive shock acceleration and stochastic acceleration. Using this hybrid MHD-kinetic approach, we aim to study the effect of the multiple shocks with varying strengths and obliquities on the resulting non-thermal particle distributions in MHD jet simulations. The time-dependency of the simulation makes the extraction of light curves at any wavelengths possible.

Keywords: AGN; Relativistic Jets; Test-particle simulations; Shock acceleration