Thakurta metric does not describe a cosmological black hole
Tomohiro Harada, Hideki Maeda, Takuma Sato
Abstract
Recently, the Thakurta metric has been adopted as a model of primordial black holes. We show that the spacetime described by this metric has neither black-hole event horizon nor black-hole trapping horizon and involves the violation of all the standard energy conditions as a solution of the Einstein equation. Therefore, this metric does not describe a cosmological black hole in the early universe. It is pointed out that a contradictory claim by the other group stems from an incorrect choice of sign.
Topics & Concepts
Event horizonPhysicsBlack hole (networking)HorizonNonsingular black hole modelsWhite holeMetric (unit)Theoretical physicsde Sitter–Schwarzschild metricSpacetimeRotating black holeApparent horizonExtremal black holeClassical mechanicsCharged black holeQuantum mechanicsAstronomyComputer scienceLink-state routing protocolRouting protocolEconomicsOperations managementRouting (electronic design automation)Computer networkCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsAstrophysical Phenomena and Observations