Fig. 3
Top panel: correlation between line abundance and excitation potential for Fe i as a function of Teff for VAS 20. Middle panel: Fe i (asterisks) and Fe ii (diamonds) abundance as a function of log g for VAS 20. A small horizontal shift was applied to the points for visualisation purposes. Bottom panel: excitation equilibrium for Fe i (asterisks) and Fe ii (diamonds) lines for VAS 20. The correlations are shown by a solid and a dashed line.
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