Free Access
Fig. 3
The best-fit NH as a function of the 0.16 μm extinction for the 10 z > 3 highly obscured or Compton thick AGN. Filled points are sources with point-like optical or near infrared morphology. The two solid lines are the expectation for a dust-to-gas ratio 100 and 1000 times lower than the Galactic one.
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.