Open Access
Fig. 1.

Download original image
Geometry and coordinate systems used for the model (see also Chen et al. 1989). ξ1 and ξ2 are respectively the inner and outer radius of the BLR, while i is the inclination. The angle ϕ is measured counter-clockwise from the near side of the disc.
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.