Würzburg 2018 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 4: Sun and Heliosphere II - Dynamics (MHD, Particles)

EP 4.4: Vortrag

Mittwoch, 21. März 2018, 11:45–12:00, BSZ - Pabel HS

Classification of singular points of flow and field in ideal or slightly non-ideal MHD flows — •Dieter Nickeler¹, Marian Karlicky¹, Thomas Wiegelmann², and Michaela Kraus¹ — ¹Astronomical Institute AV CR, Fričova 298, 251 65 Ondrejov, Czech Republic — ²Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany

Magnetic reconnection scenarios are often connected with the existence of singular points of plasma flows and magnetic fields. In this talk we want to elucidate the relationship between different classes of magnetic null points and stagnation points and corresponding non-ideal terms. This can enlighten the nature of the "Anti-Reconnection" problem, as not every null point or stagnation point guarantees the existence of a reconnection process. We analyse possible configurations in the vicinity of these singular points, as they may occur, e.g., in solar magnetic cusp and arcade structures, concerning their geometrical and topological structure and that of the non-ideal terms in almost ideal Ohm's law.