Fig. 4.

Download original image
Cusped envelope of the wave fronts emanating from a uniformly rotating source point whose linear speed exceeds the speed of light, c. (a) Three-dimensional view of the two-sheeted envelope of wave fronts emanating from a volume element of the current sheet. This envelope spirals into the far zone, maintaining a symmetry with respect to the plane of the orbit of the source element. (b) Cusp locus along which the two sheets of the envelope meet. This curve tangentially touches the light cylinder where it crosses the plane of the orbit and spirals into the far zone on a hyperboloid whose asymptotes lie on the cones θP = arcsin[c/(rSω)] and θP = π − arcsin[c/(rSω)], where rS is the radius of the circular orbit of the source element.
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.