Bremen 2017 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 4: Sonne und Heliosphäre I

EP 4.6: Talk

Tuesday, March 14, 2017, 15:30–15:45, GW2 B2880

Semi-Analytical Calculation of Interplanetary Magnetic Field Configurations — •Sophie Aerdker — Ruhr-Universität-Bochum, Lehrstuhl für Weltraum- und Astrophysik

A model from Giacalone et. al. (2002) is introduced, which describes disturbances in the magnetic field of the Sun. Those disturbances are caused by interaction between the slow and fast solar wind leading to compression regions in the solar wind and the magnetic field near the sun. Once the model is presented, the possibility to visualize various regions of perturbation will be analyzed by variation of parameters. Additionally a parametrisation by time allows the representation of time dependent magnetic fields, so that magnetic fields of coronal mass ejections and temporal profiles of solar wind velocities and magnetic field strenghts can be quantified, illustrated and analyzed. Finally the model will be enhanced by a second perturbation region where also temporal dependences are considered. The mainly analytical model is applicable as an easy input for numerical calculation of solution of transport equations. This, in particular, makes it possible to simulate the propagation of particles in interplanetary space especially within 2 AU where shocks are not formed yet.