SMuK 2023 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 7: Sun and heliosphere II

EP 7.2: Talk

Wednesday, March 22, 2023, 14:30–14:45, ZEU/0160

Quasi-discontinuous solar wind solutions — •Lukas Westrich — Ruhr-Universität Bochum, Institute for theoretical physics IV

In this talk the solar wind and its acceleration and heating will be examined. Recently Shergelashvili et al. (2020) developed a new class of discontinuous solar wind solutions. They considered a case of quasi-adiabatic radial expansion with a jump in the flow velocity, density, and temperature but a continuous Mach number at the critical point and derived analytical solutions. Therefore, they proposed a localized external heating source without actual modeling. First I will present the motivation and the physical background for this solutions. After a discussion of this new discontinuous concept for the solar wind, I will develop and discuss continuous numerical solutions, more similar to the classical Parker solar wind model, but with quasi-adiabatic radial expansion with an explicitly formulated localized heating source. This will be done both stationary and dynamically. This kind of solutions can reproduce the analytically derived solutions without discontinuous jumps in the physical properties.