Free Access
Fig. 7

Variations of the EWs of the Hα, Hβ, and He I λ 5876 emission lines. The red arrows in the Hα panel indicate the epochs of the X-ray observations. The various symbols stand for different instruments as identified in the box at the bottom.
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.