MG12 - Talk detail
 

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Abstract

Equatorial circular orbits in the Kerr-Newman-de Sitter spacetimes

We present influence of the cosmological constant on the character of geodetical equatorial circular orbits in the rotating and charged Kerr-Newman black-hole and naked-singularity spacetimes. Relations for the specific energy and specific angular momentum of a particle on the equatorial circular orbit are presented and conditions for the existence of geodesics are determined. Significant limits such as static radius, circular photon orbits are analysed. We discuss existence, orientation and stability of the equatorial circular orbits.

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