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gr-qc2024
Exact analytic photon escape cones and silhouettes for extremal Kerr
Joshua Baines, Matt Visser
We exhibit exact analytic, fully explicit, photon escape cones and related silhouettes ("shadows") at arbitrary distance from the extremal Kerr black hole. In contrast to the situa…
gr-qc2024
Perturbative photon escape cones in the Kerr spacetime
Joshua Baines, Matt Visser
We consider the perturbative, fully explicit, analytical behaviour of photon escape cones in the Kerr spacetime. When one conducts the fully general non-perturbative Kerr analysis,…