Free Access
Fig. 1
Ca II H and K lines for the sample stars. For comparison, the spectra of the Sun and Arcturus are plotted at the bottom and top of the figure, respectively. Evidence of activity is present in 63 Eri, IP Eri, V1379 Aql, DR Dra, and 56 Peg.
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.