Multipoint Observations of Polar Crown Filament Eruption Using Solar Orbiter and Solar Dynamics Observatory

On 20 April 2023, a prominence eruption was observed near the north pole of the Sun. This feature, visible as a large Polar Crown Filament (PCF) for several days prior to the event, was captured by Solar Orbiter from a vantage point distinct from that of the Solar Dynamics Observatory (SDO). By combining stereoscopic observations from SDO and Solar Orbiter, we identified the 3D structure of the filament and analyzed the dynamics of the eruption. We found that small, mixed-polarity magnetic regions existed within the dominant polarity region at the north pole prior to the eruption. The presence of a Magnetic Flux Rope (MFR) was suggested by the signature of an oval-like cavity surrounding the prominence, as observed in both coronal imagery and during a coincident Total Solar Eclipse (TSE). Our analysis indicates that successive magnetic reconnections led to the release of the MFR into interplanetary space. The precise locations of the footpoints associated with the reconnecting magnetic-field lines and the MFR were determined using a triangulation method based on brightening locations during the eruption. Furthermore, the occurrence of a jet-like structure suggests that reconnection between closed and open field lines may have also occurred. Through analysis of the 3D geometric evolution of the PCF, we propose that a magnetic breakout process drove the eruption.