Free Access
Fig. 4

The redshift distribution of the sight line number density n(X) of strong Mg ii absorption systems per comoving Mpc (bins of Δz = 0.15), divided into three subsamples according to the u-band (top panel) and i-band (bottom panel) apparent magnitude of the background quasar.
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.