Nonequilibrium Ionization Plasma during a Large Solar Limb Flare Observed by Hinode/EIS

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<jats:title>Abstract</jats:title> <jats:p>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 <jats:sc>xxiv</jats:sc>/Fe <jats:sc>xxiii</jats:sc> ratios increase downstream of the reconnection outflow, and they are consistent with the time-dependent ionization effect at a constant electron temperature <jats:italic>T</jats:italic> <jats:sub> <jats:italic>e</jats:italic> </jats:sub> = 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.</jats:p>

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