Free Access

Fig. 5


Evolution of the FWHM of the He I λ6678 line. Note the progressive narrowing of the line as the shell phase develops and the large values when EW(Hα) is positive (interpreted as the absence of the disc).

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.