Fig. 7
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Top: iron abundance obtained with fitting using SME with either MARCS atmospheres or Atlas/Castelli atmospheres. Atlas/-Castelli atmospheres are extrapolated in the grey region. Bottom: comparison of the iron abundance obtained by fitting with SME and with korg. Both use MARCS atmospheres. Symbols mark the stars belonging to clusters Melotte 25 (circles), Melotte 22 (diamonds), and NGC 2632 (squares). Crosses are measurements for the stars without a trustworthy fit. The solid line is the trend derived in Section 3.4 for the GALAH DR4 iron abundance in dwarfs.
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