Fig. 2.
Schematic geometry of the axially symmetric emitting regions in the space of Boyer-Lindquist coordinates (r, θ). The emitting regions are limited to r < rmax = 6 M and θmin < θ, π − θ < θmax. In the case of polar caps (TH1), we adopt θmin = 0 and θmax = 30°. In the case of equatorial disc (TH4), we adopt θmin = 75° and θmax = 90°.
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.