Open Access
Fig. 4.
Download original image
Left: FLECHAS spectra of HD254477. Whereas the ISM Na I lines show no variation between epochs, the Doppler variation of He Iλ5876 line is clear. Right: FLECHAS spectra of HD254577. The He Iλ5876 triplet, as well as the Na I lines, does not show significant variation.
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.