Fe IX (dark colors) and Fe X (light colors) timescales for ionization (blue lines), recombination (purple lines), and collisional excitation (yellow lines), compared with solar-wind expansion times computed at 4.25 R_⊙ for three representative values of the outflow velocity (20 km s⁻¹, green dot; 50 km s⁻¹, orange dot; 100 km s⁻¹, red dot). The vertical bars mark the variation in the timescales computed at 4.25 R_⊙ with the two temperature values derived in the present analysis (cold solution, ∼0.5 MK, and hot solution, ∼1.4 MK). See the text for details.