Open Access

Fig. 5.


(FUV−NUV) GALEX colours (black dots) and lower limit colours (red triangles) as a function of emission redshift for the quasar sample used by Ribaudo et al. (2011) for studying LLS statistics. Quasars circled in green colour (including the lower limits) have spectroscopically identified LLSs. The vast majority of quasars with (FUV−NUV) > 2 have spectroscopically identified LLSs.

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.