Free Access

Fig. 2


Comparison of the solar spectrum (black) to two seismic solar analogs, KIC 4914923 (blue) and KIC 5774694 (red), around the Ca K line observed with the Hermes spectrograph and illustrative to stars with different magnetic activity levels and ages.

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.