On cosmological signatures of baryons-dark energy elastic couplings
Jose Beltrán Jiménez, Dario Bettoni, David Figueruelo, Florencia A. Teppa Pannia
Abstract
We consider a scenario where dark energy and baryons are dynamically coupled without any energy transfer. In this scenario, the background cosmology is unaffected and, at the perturbations level, the coupling only appears through the corresponding Euler equations of dark energy and baryons. We then explore some phenomenological consequences of this scenario and their signatures in several cosmological observables. In particular, we show its ability to suppress the growth of cosmic structures. We also constrain the parameters of the model with cosmological data and show that an interaction of dark energy with baryons on cosmological scales is mildly favoured.
Topics & Concepts
PhysicsDark energyCosmologyLambda-CDM modelBaryonCoupling (piping)Cosmological modelBaryon acoustic oscillationsTheoretical physicsDark matterCOSMIC cancer databasePhenomenological modelParticle physicsPhysical cosmologyQuintessenceAstrophysicsDark fluidEnergy (signal processing)Cosmological perturbation theoryInflation (cosmology)Non-standard cosmologyUniversePhenomenology (philosophy)Cosmic background radiationMetric expansion of spaceQuantum electrodynamicsCosmic microwave backgroundCosmological constantObservational cosmologyClassical mechanicsEnergy densityCosmology and Gravitation TheoriesPulsars and Gravitational Waves ResearchBlack Holes and Theoretical Physics