Free Access
Fig. 1
Mean spectra from KP4m, NOT, WHT (bottom to top), offset in flux for clarity. The top panel is a zoom-in of the WHT spectrum, demonstrating some of the stronger lines of heavy elements, such as MgII 4481 Å and SiIII 4552, 4567 Å.
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.