Free Access

Fig. 7

thumbnail

Surface nitrogen to carbon mass ratio versus the nitrogen to oxygen ratio at the end of hydrogen burning (circles) and end of helium burning (squares), for different stellar masses at Z = 0.014. As shown at the bottom, different symbol sizes indicate different stellar masses, from 1.7 M up to 15 M.

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.