Fig. 20
a) [Mg/Fe] measurements for the medium and high resolution spectroscopic samples of RGB stars from (Letarte et al. 2010; Kirby et al. 2010) (coloured filled circles). The colours represent the age in Gyr, derived from the SFH. Stars in the Milky Way are shown for comparison (small grey points). b) [Mg/Fe] is plotted directly against age for the same sample.
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