Fig. 23
Plot for 47 Tuc (top), using the same filter combination adopted in Milone et al. (2012) to show a split RGB (see their Figs. 21 and 26). The photometry is not the same. Ba-rich and Ba-poor stars are not segregated. For NGC 6752 (bottom), we show the same effect on a plot similar to the one in Milone et al. (2013; their Fig. 15).
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