Light rings of stationary spacetimes
Rajes Ghosh, Sudipta Sarkar
Abstract
We present a novel theorem regarding light rings in a stationary spacetime with an ergoregion. We prove that any stationary, axisymmetric, and asymptotically flat spacetime in $1+3$ dimensions with an ergoregion must have at least one light ring outside the ergoregion. A possible extension of the proof for asymptotically de Sitter and anti--de Sitter spherically symmetric black holes is also discussed.
Topics & Concepts
SpacetimePhysicsExtension (predicate logic)Rotational symmetryTheoretical physicsBlack hole (networking)Ring (chemistry)Space (punctuation)Mathematical physicsClassical mechanicsQuantum mechanicsComputer scienceMechanicsLink-state routing protocolOrganic chemistryRouting protocolRouting (electronic design automation)ChemistryOperating systemComputer networkProgramming languageBlack Holes and Theoretical PhysicsAstrophysical Phenomena and ObservationsCosmology and Gravitation Theories