Free Access

Fig. 11


Estimated AR area (top panel) and contrast relative to the QS (bottom panel) during solar cycle 23 for various lines: He i 584 Å (circles), O iii 600 Å (triangles), O v 630 Å (diamonds), Mg x 625 Å (squares), Si xi 303 Å (crosses), and Si xii 521 Å (stars).

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.