The Cosmological Constant as Event Horizon
E. Gaztañaga
Abstract
General Relativity allows for a cosmological constant (Λ) which has inspired models of cosmic Inflation and Dark Energy. We show instead that rΛ=3/Λ corresponds to an event horizon: a causal boundary term in the action. Our Universe is expanding inside its Schwarzschild radius rS=rΛ=2GM, which could have originated from a uniform free falling cloud of mass M that collapsed as a Black Hole (BH) 25 Gyrs ago. Such a BH Universe allows for large-scale structure formation without the need of Inflation or Dark Energy.
Topics & Concepts
PhysicsEvent horizonCosmological constantSchwarzschild radiusDark energyInflation (cosmology)Observable universeHorizonTheoretical physicsEvent (particle physics)AstrophysicsUniverseClassical mechanicsCosmologyAstronomyGravitationCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsRelativity and Gravitational Theory