Diagnosing Flare Dynamics Through the fe XXI 1354.08Å Line
Abstract
The Fe XXI 1354.08 line is the only strong emission line formed above 10 MK in the spectral range of IRIS. It has been demonstrated to be very useful in diagnosing flare dynamics. For instance, the completeevolution of chromospheric evaporation has been well observed and it appears to correlate with the energy deposition rate in many flares, which provides critical constraint to models of chromosphericevaporation. With the Fe XXI line we have even observed multi-episode chromospheric evaporations in a flare. The Fe XXI line has also been successful in observing reconnection outflows, revealing important insight into the flare reconnection process. Moreover, global MHD oscillations have been detected in flare loops, both in the intensity and Doppler shift of the Fe XXI line, allowing more accurate mode identification that is crucial for coronal seismology.
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E3385T