Image Details
Caption: Figure 2.
The universal horizon formula (Equation (31)) plotted inside the critical curve for black holes viewed at inclinations θo = 0, 20, 60, 80 deg (rows) and spins a* = 0.01, 0.5, 0.99 (columns). In all panels, white contours indicate successive images of the black hole’s equator θs = π/2, and integrated streamlines following the local EVPA are plotted in black.
© 2026. The Author(s). Published by the American Astronomical Society.