Free Access

Fig. 15.


Al I lines in M15 stars. The green lines show the Si-enhanced stars from Fig. 14, and the magenta lines show the Mg- and Al-weak stars from Fig. 13.

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.