Free Access

Fig. 7


[alpha/Fe] vs. [Fe/H]. Filled blue circles are our data for NGC 6440, filled red triangles are NGC 6441 (Gratton et al. 2006, 2007), filled yellow triangles are Terzan 5 (Origlia et al. 2011, 2013), filled cyan triangles are Terzan 4 (Origlia & Rich 2004), 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 (Gonzalez et al. 2012), filled green squares are GCs from Pritzl et al. (2005), and filled gray triangles are halo and disk fields stars (Venn et al. 2004).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.