Free Access
Fig. 1

Raw positions, uncorrected for metallicity, of the inactive (“flat”) Mt. Wilson stars in the observational HRD, together with a set of evolutionary tracks, readily revealing these stars their late MS evolutionary stage even by this crude comparison.
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.