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Horava's quantum gravity illustrated by embedding diagrams of the Kehagias-Sfetsos spacetimes

Journal article
Authors K. Goluchova
K. Kulczycki
R. S. S. Vieira
Z. Stuchlik
W. Kluzniak
Marek A Abramowicz
Published in General Relativity and Gravitation
Volume 47
Issue 11
ISSN 0001-7701
Publication year 2015
Published at Department of Physics (GU)
Language en
Keywords Horava's gravity, Spherically symmetric KS solution, Optical geometry, Embedding, regular black-holes, heterotic string theory, lifshitz gravity, nonlinear electrodynamics, geometry, Astronomy & Astrophysics, Physics
Subject categories Astronomy, Astrophysics and Cosmology


Possible astrophysical consequences of the Horava quantum gravity theory have been recently studied by several authors. They usually employ the Kehagias-Sfetsos (KS) spacetime which is a spherically symmetric vacuum solution of a specific version of Horava's gravity. The KS metric has several unusual geometrical properties that in the present article we examine by means of the often used technique of embedding diagrams. We pay particular attention to the transition between naked singularity and black-hole states, which is possible along some particular sequences of the KS metrics.

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