Fig. 12.
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Comparison of the average [Si/Fe] ratio in NGC 6388 (red point with error bar) to six different studies of bulge field stars in the metallicity range centred on the cluster: Alves-Brito et al. (2010), Johnson et al. (2014), Bensby et al. (2017), Lucey et al. (2019, 2022), and Duong et al. (2019a). The evolutionary stage of each sample is reported in the panels.
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