Machine Learning Cosmic Backreaction and Its Effects on Observations
S. M. Koksbang
Abstract
Symbolic expressions for cosmic backreaction and mean redshift drift in a range of two-region models in terms of average quantities are presented. The demonstration that these expressions can be obtained constitutes the opening of a new avenue towards understanding the effects of cosmic backreaction in our universe: With a symbolic expression for the redshift drift at hand, the redshift drift can be used to constrain cosmological parameters including the large-scale expansion rate and backreaction. In addition, by introducing symbolic expressions for cosmic backreaction, this quantity can be constrained with observations such as redshift-distance measures.
Topics & Concepts
PhysicsRedshiftCOSMIC cancer databaseMetric expansion of spaceUniverseAstrophysicsRange (aeronautics)Physical cosmologyTheoretical physicsCosmologyDark energyDe Sitter universeGalaxyAerospace engineeringEngineeringCosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaAstronomy and Astrophysical Research