| |
 |
| Paper: |
Hinode Observations of an Eruption from a Sigmoidal Active Region |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
391 |
| Authors: |
Green, L. M.; Wallace, A. J.; Kliem, B. |
| Abstract: |
We analyse the evolution of a bipolar active region which produces an eruption
during its decay phase. The soft X-ray arcade develops high shear over a time
span of two days and transitions to sigmoidal
shortly before the eruption. We propose that the continuous sigmoidal soft
X-ray threads indicate that a flux rope has formed which is lying low in
the solar atmosphere with a bald patch separatrix surface topology.
The formation of the flux rope is driven by
the photospheric evolution which is dominated by fragmentation of
the main polarities, motion
due to supergranular flows and cancellation at the polarity inversion line. |
|
|
|
|
|
