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

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arxiv 1710.02403 v1 pith:42QRP5I7 submitted 2017-10-06 gr-qc math-phmath.MP

Claudio F. Paganini , Marius A. Oancea This is my paper · ORCID
classification gr-qcmath-phmath.MP
keywords setsfuturekerr-newman-taub-nutobserverpasttrappedblackcelestial
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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.

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Cited by 1 Pith paper

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  1. Determining parameters of Kerr-Newman black holes by shadow observation from finite distance and spatial infinity

    gr-qc 2024-11 conditional novelty 6.0 of 10

    The shadow contour of a Kerr-Newman black hole observed at infinity uniquely fixes (a/M, Q/M, i), while finite-distance shadows are degenerate for zero spin.

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