Distribution of [Na/H] ratios in the metallicity range −1.7 < [Fe/H] < −1.4 dex for field (upper panel) and cluster stars (lower panel). The dashed line fixes the upper envelope of the field stars distribution and the boundary between first- and second-generation stars in NGC 6752.
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.