Activity cycle phase difference Δϕ against the photometric sine amplitude. Colors and symbols have the same meaning as in Fig. 6. The photometric amplitude of the solar cycle (yellow star) was adopted from Shapiro et al. (2016). These authors calculated a total amplitude of 0.37 mmag, which results in a sine amplitude of ampphot, Sun = 0.185 mmag.
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.