Free Access
Fig. 3
Scheme of the HMC (left), HHMC (middle), and HII region (right) models. The spatio-temporal evolution of the radiation field is included in the computation of the relative abundances only for the HII region models.
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.