Free Access

Fig. 6

thumbnail

Simulated values of the photometric brightness change δ(b + y)/2 (upper panel) and S-index (lower panel) vs. stellar inclination i. Solid curves correspond to the solar distribution of active regions, dashed to polar distribution, and dotted to homogeneous distribution. The coverage by faculae and spots for all three distributions is chosen so that the S-index observed from the stellar equatorial plane (i = 90°) equals 0.19.

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.