The surge-like eruption of a miniature filament associated with circular flare ribbon
Abstract
We present a study of a mini-filament erupting in association with a circular ribbon flare observed by NVST and SDO/AIA on 2014 March 17. The filament was located at one footpoint region of a large loops. The potential field extrapolation shows that it was embedded under a magnetic null point configuration. First, we observed a brightening of the filament at the corresponding EUV images, close to one end of the filament. With time evolution, a circular flare ribbon was observed around the filament at the onset of the eruption, which is regarded as a signature of reconnection at the null point. After the filament activation, its eruption took the form of a surge, which ejected along one end of a large-scale closed coronal loops with a curtain-like shape. We conjecture that the null point reconnection may facilitate the eruption of the filament.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- February 2018
- DOI:
- 10.1007/s10509-017-3244-3
- Bibcode:
- 2018Ap&SS.363...26L
- Keywords:
-
- Sun: activity;
- Sun: filaments;
- prominences;
- Sun: corona;
- Sun: magnetic fields;
- Sun: flares;
- Sun: magnetic topology