[Mg/Fe], [Na/Fe] vs. [Al/Fe]. Filled blue circles are our data for NGC 6440, filled red triangles are NGC 6441 (Gratton et al. 2006), filled Yellow triangles are Terzan 5 (Origlia et al. 2011), filled dark green triangles are NGC 6553 (Tang et al. 2017), filled magenta triangles are HP1 (Barbuy et al. 2016), filled orange triangles are bulge field stars (Lecureur et al. 2007), filled green square are GCs from (Carretta et al. 2009c), and filled gray triangles are halo and disk fields stars (Fulbright 2000; Reddy et al. 2003, 2006; Barklem et al. 2005; Cayrel et al. 2004).
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