Open Access

Fig. 2.


(J − Ks)0 vs. GBP − GRP colour–magnitude diagram. OBA stars roughly fall in the region highlighted by the orange ellipse. This representation shows that hot stars stand out qualitatively in colour–colour space.

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.