Rotating black holes embedded in a cosmological background for scalar-tensor theories
Eugeny Babichev, Christos Charmousis, Nicolas Lecoeur
Abstract
Abstract We present solutions of DHOST theories describing a rotating black hole embedded in an expanding universe. The solution is constructed by conformal transformation of a stealth Kerr(-de Sitter) black hole. The conformal factor depends explicitly on the scalar field — but not on its derivative — and defines the new theory. The scalar field of the stealth Kerr(-de Sitter) solution depends on time, leading to the time-dependence of the obtained conformal metric, with cosmological asymptotics at large distances. We study the properties of the obtained metric by considering regular null geodesic congruences, and identify trapping black hole and cosmological horizons.
Topics & Concepts
PhysicsDe Sitter universede Sitter–Schwarzschild metricScalar fieldConformal mapBlack hole (networking)Mathematical physicsTheoretical physicsGeodesics in general relativityScalar (mathematics)Anti-de Sitter spaceGeodesicRotating black holeConformal symmetryMetric expansion of spaceClassical mechanicsDark energyUniverseCosmologyQuantum mechanicsGeneral relativityGeometryLink-state routing protocolMathematicsComputer scienceRouting protocolAngular momentumRouting (electronic design automation)Computer networkCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsAstrophysical Phenomena and Observations