The influence of the non-thermal electron power distributions on the Fe XXV excitation equilibrium in the solar CORONA

The influence of the electron power distribution on the excitation equilibrium of the Fe XXV in the solar corona is studied. A parametric form of the distribution function is used to demonstrate the changes in the excitation equilibrium. A new parameter, a pseudo-temperature, is introduced for better understanding of physics. It is shown that the Fe XXV line intensities depend on the shape of the electron distribution and the unusual Fe line ratios can be observed for non-thermal distribution. The results can be used in specific applications in the solar corona, especially in diagnostics of the impulsive phase of solar flares, where the deviations from the Maxwellian distribution can be large.