Line asymmetries of the Fe i λ5500 Å with Ei = 3 eV as a function of the dynamical phase φd. Line strength changes in order of oscillator strength with log gf1> log gf2> log gf3 > log gf4. Dynamical phase zero coincides with the velocity reversal from contraction to expansion in the photosphere. The line asymmetry curves are shifted by 0.5 dex relative to each other for clarity.
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