Fig. 4.
Global quality of the stellar parameters over the sample. Upper two panels: distribution of the slopes for [Fe I/H] abundances with respect to the excitation potential χex (left); and EWs of lines (right). Lower two panels: distribution of the ionisation balance, [Fe I/H]–[Fe II/H], (left); and dispersion of Fe abundances from individual lines around the mean (right).
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