Fuzzball Shadows: Emergent Horizons from Microstructure
Fabio Bacchini, Daniel R. Mayerson, Bart Ripperda, Jordy Davelaar, Héctor Olivares, Thomas Hertog, Bert Vercnocke
Abstract
We study the physical properties of four-dimensional, string-theoretical, horizonless "fuzzball" geometries by imaging their shadows. Their microstructure traps light rays straying near the would-be horizon on long-lived, highly redshifted chaotic orbits. In fuzzballs sufficiently near the scaling limit this creates a shadow much like that of a black hole, while avoiding the paradoxes associated with an event horizon. Observations of the shadow size and residual glow can potentially discriminate between fuzzballs away from the scaling limit and alternative models of black compact objects.
Topics & Concepts
Event horizonPhysicsScalingHorizonLimit (mathematics)ChaoticRedshiftShadow (psychology)Scaling limitString (physics)Black hole (networking)Event (particle physics)ResidualOpticsAstrophysicsTheoretical physicsAstronomyGeometryComputer scienceMathematicsComputer networkPsychologyArtificial intelligenceRouting (electronic design automation)PsychotherapistGalaxyMathematical analysisLink-state routing protocolRouting protocolAlgorithmAstrophysical Phenomena and ObservationsBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research