Definition of one spectral index. The KPNO atlas with resolution R = 500 000 is shown in grey. The other spectra with resolution R = 8000 are from the Sun (black), HD 196378 (red), and HD 182572 (blue). The dashed lines indicate the boundaries of index 19, formed by two Fe I lines.
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.