[Eu, Ba/Fe] vs. [Fe/H]. Filled blue circles are our data for NGC 6440, filled red triangles are NGC 6441 (Gratton et al. 2006), filled magenta triangles are HP1 (Barbuy et al. 2016), filled orange triangles are bulge field stars (Van der Swaelmen et al. 2016), filled green square are GCs from Pritzl et al. (2005), and filled gray triangles are halo and disk stars (Fulbright 2000; François et al. 2007; Reddy et al. 2006; Barklem et al. 2005; Venn et al. 2004).
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