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| Titel |
Solar Eruptions Triggered by Flux Emergence |
| VerfasserIn |
Tibor Torok, James E. Leake, Sally Dacie, Roberto Lionello, Zoran Mikic, Viacheslav S. Titov, Cooper Downs, Mark G. Linton, Pascal Demoulin, Lidia van Driel-Gesztelyi, David M. Long |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250145711
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| Publikation (Nr.) |
 EGU/EGU2017-9678.pdf |
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| Zusammenfassung |
| Observations have shown a clear association of prominence eruptions and CMEs with
the emergence of magnetic flux close to or within filament channels. It has been
suggested that reconnection triggered by the emergence destroys the force balance
between the magnetic field in the filament channel and its ambient field, causing
the former to erupt. Magnetohydrodynamic (MHD) numerical simulations support this
scenario for two-dimensional (2D) coronal flux-rope configurations. However, they
do not take into account 3D effects such as the anchoring of the flux rope in the
dense photosphere or the occurrence of 3D MHD instabilities. Here we present the
first fully 3D MHD simulations of flux emergence in the vicinity of a coronal flux
rope. We vary the position and orientation of the emerging flux and investigate
under which conditions eruptions occur. We compare our results with corresponding
2D simulations and demonstrate how they can be used to explain a complex, two-phase
prominence eruption observed on 18 July 2014. |
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