The Fe ionization (upper) and recombination rates (bottom) for the bi-Maxwellian distribution with p = 1/5 (colored dot-dot-dot-dashed lines), 1/10 (color dashed lines), and 1/20 (colored full lines), (left), and p = 5 (colored dot-dot-dot-dashed lines), 10 (colored dashed lines), and 20 (colored full lines), (right) together with Maxwellian rates (black lines). Different colors correspond to different Fe ions.