Spectroscopic Observations of the Eruption of an Filament and Associated Magnetic Reconnection
Abstract
We analyze the spectroscopic data from Interface Region Imaging Spectrograph (IRIS) and images from Solar Dynamics Observatory (SDO) to investigate the eruption and associated magnetic reconnection of a filament structure in an active region (AR). Doppler maps derived from Si IV 1394 Å based on single Gaussian fitting indicate that the filament structure ascended rapidly after the birth of the situated AR. The ascent apparently ceased ~2 days after the rapid ascent. The filament structure gradually ascended again ~1 day before the eruption. Blue and red shifts of ~30 km/s are observed in a narrow flare region between two filament threads ~2 hours before the eruption, which are probably the signatures of the outflows of magnetic reconnection between the two filament threads. Eventually the upper filament thread erupted and the lower filament thread remained. Downward motion with a red shift of ~30 km/s and density enhancement are also observed in the regions of flare ribbons during the eruption. This work pictures the evolution of a filament structure before an eruption and the associated magnetic reconnection between two filament threads.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMSH0010013H
- Keywords:
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- 7507 Chromosphere;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7509 Corona;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7524 Magnetic fields;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7546 Transition region;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY