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SH: Pseudostreamer influence on flux rope evolution – Sahade
April 22 @ 12:30 pm – 12:45 pm CMT
Pseudostreamers (PSs) are coronal magnetic structures formed by arcs of twin loops capped by magnetic field lines from coronal holes of the same polarity that meet at a central spine. They contain a single magnetic null point in the spine, just above the closed field lines, which are thought to have the potential of influencing the evolution of nearby flux ropes (FRs). To study the early evolution of the FR, focusing on ejection and non-radial motions, we performed numerical simulations in which an FR structure is in the vicinity of a PS magnetic configuration. We determine different classes of dynamic behaviour from the FR trajectories and analyse the magnetic cages that enclose de FRs and the FR variables to explain them. The combined magnetic field of the PS and the FR results in the formation of two magnetic null points. These affect the trajectory of the FR and the topology of the initial magnetic field. While the magnetic cage over the FR plays a crucial role in whether or not the FR erupts, the magnetic null points are decisive in the direction and amount of deflection that the FR undergoes.