Publication Name: Astrophysical Journal; First HAO Author's Name: Sarah Gibson

In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume. In SOHO/LASCO C2, a partial halo was observed. The prominence eruption begins with a slow rise and then evolves to a fast rise phase. 

3D magnetic evolution of an erupting pseudostreamer

3D magnetic evolution of an erupting pseudostreamer at 10 000, 70 000, 140 000 and 210 000 iterations. Magnetic eld lines end at 3 Solar radii. Notice the untwisting magnetic eld lines away from the pseudostreamer.

We first construct a non-linear force free eld (NLFFF) model of this erupting pseudostreamer using the flux rope insertion method. The NLFFF model produces the 3D coronal magnetic field constrained by observed coronal structures and the SDO/HMI photospheric magnetogram taken 3 days earlier. We then increase axial and poloidal flux in the model to make it unstable. The field configurations representing the eruption are not in force-free equilibrium. We magnetofrictionally evolve the model until the flux rope expands to three solar radii and compare CME propagation with the SOHO/LASCO C2 observations. We perform a topological analysis of the models in order to determine the location of quasi-separatrix layers (QSLs) and how the QSLs location is transferred as the simulation progressed.

link to article: Magnetofrictional Modeling of an Erupting Pseudostreamer