Radial velocity of the prominent emission peak in the profile of He i 6678 Å folded with the 99.90-day period represented by solid symbols: dots Ondřejov, triangles DAO, square BeSS. The open symbols indicate the emission velocities of Hα: circles Ondřejov, triangles DAO, diamond BeSS.
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.