Nonequilibrium Ionization Plasma during a Large Solar Limb Flare Observed by Hinode/EIS
Abstract
This study on plasma heating considers the time-dependent ionization process during a large solar flare on 2017 September 10, observed by Hinode/EUV Imaging Spectrometer (EIS). The observed Fe XXIV/Fe XXIII ratios increase downstream of the reconnection outflow, and they are consistent with the time-dependent ionization effect at a constant electron temperature Te 25 MK. Moreover, this study also shows that the nonthermal velocity, which can be related to the turbulent velocity, reduces significantly along the downstream of the reconnection outflow, even when considering the time-dependent ionization process.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2021
- DOI:
- 10.3847/2041-8213/ac063c
- arXiv:
- arXiv:2105.14660
- Bibcode:
- 2021ApJ...914L..28I
- Keywords:
-
- Solar flares;
- 1496;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 13 pages, 4 figures, accepted for publication in ApJL