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  Characterization of Null Geodesics on Kerr Spacetimes

Paganini, C., Ruba, B., & Oancea, M. A. (submitted). Characterization of Null Geodesics on Kerr Spacetimes.

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1611.06927.pdf (Preprint), 5MB
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 Creators:
Paganini, Claudio1, Author           
Ruba, Blazej, Author
Oancea, Marius A., Author
Affiliations:
1Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24012              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Mathematical Physics, math-ph,Mathematics, Mathematical Physics, math.MP
 Abstract: We consider null geodesics in the domain of outer communication of a
sub-extremal Kerr spacetime. We show, that most fundamental properties of null
geodesics can be represented in one plot. In particular one can see immediately
that the ergoregion and trapping are separated in phase space. Furthermore we
show that from the point of view of any timelike observer outside of a black
hole, trapping can be understood as a smooth set of spacelike directions on the
observers' celestial sphere.

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 Dates: 2016-11-1720172017
 Publication Status: Submitted
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 1611.06927
URI: http://arxiv.org/abs/1611.06927
 Degree: -

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