Fig. 6
Mean α-element abundances in open cluster RGB stars. The result for this study is indicated by the red circle. Results from Tautvaišienė et al. (2005); Mikolaitis et al. (2010, 2011a,b); Drazdauskas et al. (2016b) are marked as the red open squares. The blue triangles indicate results from Reddy et al. (2012, 2013, 2015); the green plus signs from Mishenina et al. (2015); and the black reverse triangles from Friel et al. (2010); Jacobson et al. (2008, 2009). The black line represents the Galactic disc evolution model by Pagel & Tautvaisiene (1995).
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