Abstracts > Abstract list by author > Shen Yuandeng

Wednesday 12
Session II-2.1 Prominence destabilization, CMEs, 3D reconstructions
Chairman: Nandita Srivastava
› 17:30 - 17:45 (15min)
Sympathetic Partial and Full Filament Eruptions Observed in One Solar Breakout Event
Yuandeng Shen  1@  , Liu Yu  1@  , Jiangtao Su  2@  
1 : Yunnan Astronomical Observatory
Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China -  China
2 : National Astronomical Observatories
Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Science, Beijing 100012, China -  China

 We report two sympathetic solar eruptions including a partial and a full flux rope eruption in a quadrupolar magnetic region where a large and a small filament resided above the middle and the east neutral lines, respectively. The large filament first rose slowly at a speed of 8 km s−1 for 23 minutes; it then accelerated to 102 km s−1 . Finally, this filament erupted successfully and caused a coronal mass ejection. During the slow rising phase, various evidence for breakout-like external reconnection has been identified at high and low temperature lines. The eruption of the small filament started around the end of the large filament's slow rising. This filament erupted partially, and no associated coronal mass ejection could be detected. Based on a potential field extrapolation, we find that the topology of the three-dimensional coronal field above the source region is composed of three low-lying lobes and a large overlying flux system, and a null point located between the middle lobe and the overlying antiparallel flux system.We propose a possible mechanism within the framework of the magnetic breakout model to interpret the sympathetic filament eruptions, in which the magnetic implosion mechanism is thought to be a possible link between the sympathetic eruptions, and the external reconnection at the null point transfers field lines from the middle lobe to the lateral lobes and thereby leads to the full (partial) eruption of the observed large (small) filament. Other possible mechanisms are also discussed briefly. We conclude that the structural properties of coronal fields are important for producing sympathetic eruptions.

Online user: 1 RSS Feed