SMuK 2023 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 10: Astrophysics: Cosmic Rays and Galaxies I

EP 10.3: Talk

Thursday, March 23, 2023, 12:00–12:15, ZEU/0160

From test particle simulations to cosmic-ray transport — Marco Kuhlen, •Vo Hong Minh Phan, and Philipp Mertsch — TTK, RWTH Aachen University, Aachen, Germany

The transport of high-energy particles in the presence of small-scale, turbulent magnetic fields is a long-standing issue in astrophysics. Analytical theories disagree with numerical simulations at rigidities where the particles' gyroradii are slightly smaller than the correlation length of turbulence. At the same time, extending the numerical simulations to lower rigidities has proven computationally prohibitive. In this talk, we will discuss a solution to the problem of perpendicular transport in isotropic turbulence at both, high and low rigidities. Our study has important implications for the transport of Galactic cosmic rays, acceleration at perpendicular shocks and for high-energy particles in the heliosphere.