Publication at Faculty of Mathematics and Physics |
2008
Abstract
We study the influence of large-scale photospheric motions on the destabilization of an eruptive filament, observed on October 6, 7, and 8, 2004. Large-scale horizontal flows were investigated from a series of MDI full-disc Dopplergrams and magnetograms.
We find that the topology of the flow field changed significantly during the filament eruptive phase. We measured an increase in the shear below the point where the eruption starts and a decrease in shear after the eruption.We conclude that there is a link between the photospheric motions and the structure of the coronal magnetic field.