Perfect fluid tori orbiting Kehagias-Sfetsos naked singularities

Abstract

We construct perfect fluid tori in the field of the Kehagias-Sfetsos (K-S) naked singularity representing spherically symmetric vacuum solution of the modified Hořava quantum gravity that is characterized by a dimensionless parameter $\omega M^2$, combining the gravitational mass parameter $M$ of the spacetime with the Hořava parameter $\omega$ reflecting the role of the quantum corrections. In dependence on the value of $\omega M^2$, the K-S naked singularities demonstrate a variety of qualitatively different behavior of their circular geodesics that is fully reflected in the properties of the toroidal structures. In all of the K-S naked singularity spacetimes the tori are located above an "antigravity" sphere where matter can stay in stable equilibrium position, that is relevant for the stability of the orbiting fluid toroidal accretion structures.

44 pages, 27 figures multi panels

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• Optical effects related to Keplerian discs orbiting Kehagias-Sfetsos naked singularities
• A no-go theorem for slowly rotating black holes in Horava-Lifshitz gravity
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• Charged tori in spherical gravitational and dipolar magnetic fields
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• Quantum Interference Effects in Horava-Lifshitz Gravity
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Cited by in corpus (13)

• Iron K$\alpha$ line of boson stars
• Ringed accretion disks: instabilities
• Distinguishing Brans-Dicke-Kerr type naked singularities and black holes with their thin disk electromagnetic radiation properties
• Observers in Kerr spacetimes: the ergoregion on the equatorial plane
• Gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
• Influence of toroidal magnetic field in multi-accreting tori
• Equilibrium non-selfgravitating tori around black holes in parameterised spherically symmetric spacetimes
• Magnetized Thick Disks around Boson Stars
• Repulsive gravity effects in horizon formation. Horizon remnants in naked singularities
• Conservative limits on the electric charge of Sgr A* in the Reissner-Nordstrom metric
• Strong gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
• Evolution of Braneworld Kerr-Newman Naked Singularities
• Polish Doughnuts around Scalarized Kerr Black Holes