Published on:
21 December 2023
Primary Category:
Cosmology and Nongalactic Astrophysics
Paper Authors:
Marco Sebastianutti,
Natalie B. Hogg,
Marco Bruni
First derivation of covariant gauge-invariant perturbations for interacting vacuum
Study evolution of H0 and σ8 in 3 interacting vacuum models
Identify if regions of parameter space resolve tensions simultaneously
When constrained by data, no model fully resolves both tensions
Interacting vacuum models and cosmological tensions
This paper analyzes three interacting vacuum dark energy models to see if they can simultaneously resolve the Hubble constant (H0) and matter clustering (σ8) tensions. The authors derive the first covariant gauge-invariant perturbation formalism for interacting vacuum models. For models with geodesic cold dark matter, they connect perturbation variables to cosmological observables like H0 and σ8. Models studied: (1) linear coupling between vacuum & matter; (2) coupling mimicking a Chaplygin gas; (3) coupling mimicking a Shan-Chen fluid. No model fully resolves both tensions simultaneously when constrained by data.
Phantom dark energy constraints from early universe measurements
Interacting dark energy and cosmic expansion
Visualizing the Hubble and matter clustering tensions
Simultaneously Reducing Tensions in Hubble Constant and Matter Density
Testing consistency of standard cosmology model over time
Cosmological constraints on inertial effects in covariant gravity
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