Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.0908t&link_type=abstract
American Astronomical Society, SPD meeting #42, #9.08; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Apart from single eruptions originating in localized source regions, the Sun sometimes produces so-called sympathetic events, which consist of
several individual eruptions occurring
almost simultaneously in different source regions. The close temporal vicinity of the individual eruptions in such events indicates the
existence of a causal link between them, but the mechanisms by which one eruption can trigger another one remain largely a mystery. A particularly beautiful example of a global sympathetic event was recently observed by the Solar Dynamics Observatory (SDO) on 1 August 2010. It included a small filament eruption and CME that was closely followed by the eruptions of two large adjacent (twin) filaments, indicating that these three eruptions were physically connected. A coronal potential field extrapolation revealed that the twin filaments were located in the lobes of a so-called pseudostreamer prior to their eruptions. Here we present a 3D MHD simulation of the successive eruption of two magnetic flux ropes in such a pseudostreamer configuration. The two eruptions are triggered by the simulated eruption of a third flux rope in the vicinity of the pseudostreamer. The simulation qualitatively reproduces the CME and subsequent twin filament eruption on 1 August 2010 and suggests that these events were indeed physically connected. Furthermore, it provides a generic scenario for the frequently observed twin filament eruptions in coronal pseudostreamers and suggests a mechanism by which such eruptions can be triggered in the first place. Our results thus provide an important step for a better understanding of sympathetic eruptions.
de Toma Giuliana
Linker Jon
Mikic Zoran
Panasenco Olga
Reeves Katharine K.
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