Smoothness of the future and past trapped sets in Kerr-Newman-Taub-NUT spacetimes

Abstract

We consider the sets of future/past trapped null geodesics in the exterior region of a sub-extremal Kerr-Newman-Taub-NUT spacetime. We show that, from the point of view of any timelike observer outside of such a black hole, trapping can be understood as two smooth sets of spacelike directions on the celestial sphere of the observer.

11 pages, 1 figure. This article is intended as a research article, and supersedes arXiv:1611.06927, which was only intended as lecture notes, so there is significant overlap of the definitions

References in corpus (4)

• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow
• Shadows of Kerr black holes with and without scalar hair
• On conformal Killing-Yano tensors for Plebanski-Demianski family of solutions

Cited by in corpus (5)

• Intrinsic curvature and topology of shadows in Kerr spacetime
• Spin Hall effects in the sky
• Magnetized Kerr-Newman-Taub-NUT spacetimes
• Rotating and charged Taub-NUT-(A)dS spacetimes on a 3-brane
• Determining parameters of Kerr-Newman black holes by shadow observation from finite distance and spatial infinity