Fig. 6

Departure coefficients (b = nNLTE∕nLTE) of selected levels of Ca I and the ground level of Ca II using different electron collisional data. Line symbols represent different levels; in red are the departure coefficients obtained when the vR+A data are used for electron collisions (see text), and in black are the b coefficients obtained when updated electron collisional data are used.
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.