Fig. 7.
Comparison between the metallicity derived from our synthesis code, [Fe/H]SYNTH, and with a classical method based on the equivalent widths of the individual iron lines Fe/H]EQW (see text). The solid line traces the line of equality while the dashed lines indicate a variation by ±0.1 dex. The size of the black circles increases with the S/N of the spectra.
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