Free Access

Fig. 13


As Fig. 11, but the ionization fraction of He iii is now shown (cf. Table 2). In contrast to hydrogen the efficiency to ionize He ii depends in this stellar parameter range crucially on the metallicity of the stars, leading to a strong influence on the Strömgren radii.

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.