Reconstruction of the dark matter-vacuum energy interaction

Abstract

An interaction between the vacuum energy and dark matter is an intriguing possibility which may offer a way of solving the cosmological constant problem. Adopting a general prescription for momentum exchange between the two dark components, we reconstruct $\alpha (a)$, the temporal evolution of the coupling strength between dark matter and vacuum energy, in a nonparametric Bayesian approach using combined observational data sets from the cosmic microwave background, supernovae and large scale structure. An evolving interaction between the vacuum energy and dark matter removes some of the tensions between different data sets. However, it is not preferred over $\Lambda$CDM in the Bayesian sense, as improvement in the fit is not sufficient to compensate for the increase in the volume of the parameter space.

6 pages, 3 figures. The published version

References in corpus (6)

• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Indications of a late-time interaction in the dark sector
• Examining the evidence for dynamical dark energy
• Cosmological constraints on a decomposed Chaplygin gas
• Inhomogeneous vacuum energy
• Post-$Planck$ constraints on interacting vacuum energy

Cited by in corpus (34)

• Dynamical dark energy in light of the latest observations
• Reconciling CMB and structure growth measurements with dark energy interactions
• Possible signals of vacuum dynamics in the Universe
• Evolution of dark energy reconstructed from the latest observations
• Constraints on the interacting vacuum -- geodesic CDM scenario
• Reconstructing Gravity on Cosmological Scales
• Relaxing the ${\sigma }_8$-tension through running vacuum in the Universe
• AIC and BIC for cosmological interacting scenarios
• Cosmological constraints on coupled dark energy
• A measurement of the Hubble constant using galaxy redshift surveys
• Reconstruction of the dark sectors' interaction: A model-independent inference and forecast from GW standard sirens
• De Sitter Stability and Coarse Graining
• Latest evidence for a late time vacuum -- geodesic CDM interaction
• Non-parametric reconstruction of interaction in the cosmic dark sector
• Growth of structure in interacting vacuum cosmologies
• Reconstructing dark energy with model independent methods after DESI DR2 BAO
• Nonsingular Cosmology from an Interacting Vacuum
• Cosmic sign-reversal: non-parametric reconstruction of interacting dark energy with DESI DR2
• Reconstructing Quintessence
• Tight $H_0$ constraint from galaxy redshfit surveys: combining baryon acoustic osillation measurements and Alcock-Paczynski test
• Observational constraints on interacting vacuum energy with linear interactions
• A possible late-time transition of $M_B$ inferred via neural networks
• Perturbations in the interacting vacuum
• Horizon Feedback Inflation
• Cosmological constrains on fast transition Unified Dark Energy/Matter models
• Nonsingular Black Holes From Charged Dust Collapse: A Concrete Mechanism to Evade Interior Singularities in General Relativity
• Implications of Dynamical Dark Energy in the expansion of the Universe and the Structure Formation
• Non-linear coupling in the dark sector as a running vacuum model
• Probing the independence within the dark sector in the fluid approximation
• Degeneracy between warm and coupled cold dark matter: A clarifying note
• Constraining Violations of the Weak Equivalence Principle in the Dark Sector
• Charged Black Holes from Interacting Vacuum
• Scalar Perturbations in Nonsingular Universes from Interacting Vacuum
• Stellar Instability from Parametric Resonance