Feature classification examples for the Ca II K line computed using Model 2. The intensity profile (solid black) is crossed by vertical lines denoting the K1V (dashed blue), K2V (solid blue), K3 (solid green), K2R (solid red), K1R (dashed red) features. Panel a: standard profile with two emission peaks is shown. Panel b: single-peaked emission is represented. Panel c: pure absorption is shown. Panel d: complex profile with multiple emission and absorption features is represented. Intensity units are 10−6 erg cm−2 Hz−1 s−1 ster−1 .
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.