Theoretical and observational bounds on some interacting vacuum energy scenarios

Abstract

The dynamics of interacting dark matter-dark energy models is characterized through an interaction rate function quantifying the energy flow between these dark sectors. In most of the interaction functions, the expansion rate Hubble function is considered and sometimes it is argued that, as the interaction function is a local property, the inclusion of the Hubble function may influence the overall dynamics. This is the starting point of the present article where we consider a very simple interacting cosmic scenario between vacuum energy and the cold dark matter characterized by various interaction functions originated from a general interaction function: $Q=\Gamma {\rho }_c^{\alpha }{\rho }_x^{1-\alpha -\beta }({\rho }_c+{\rho }_x{)}^{\beta }$, where ${\rho }_c$, ${\rho }_x$ are respectively the cold dark matter density and vacuum energy density; $\alpha$, $\beta$ are real numbers and $\Gamma$ is the coupling parameter with dimension equal to the dimension of the Hubble rate. We investigate four distinct interacting cosmic scenarios and constrain them both theoretically and observationally. Our analyses clearly reveal that the interaction models should be carefully handled.

14 pages, 9 figures and 4 tables. We dedicate this work to the memory of Prof. John D. Barrow. The article has been accepted for publication by Phys. Rev. D

References in corpus (25)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Large-scale instability in interacting dark energy and dark matter fluids
• Indications of a late-time interaction in the dark sector
• Cosmologies with Energy Exchange
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• Dark sector interaction: a remedy of the tensions between CMB and LSS data
• Interacting models may be key to solve the cosmic coincidence problem
• Toward a solution of the coincidence problem
• Coupled dark matter-dark energy in light of near Universe observations
• A new interacting two fluid model and its consequences
• Novel approach towards the large-scale stable Interacting Dark-Energy models and their Astronomical Bounds
• Interacting Dark Energy in a closed universe
• Dark Coupling and Gauge Invariance
• Thermodynamics second law and $\omega =-1$ crossing(s) in interacting holographic dark energy model
• Searching for dark matter - dark energy interactions: going beyond the conformal case
• Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
• Post-$Planck$ constraints on interacting vacuum energy
• Coupled dark energy with perturbed Hubble expansion rate
• Dark degeneracy I: Dynamical or interacting dark energy?
• Cosmological constraints on coupled dark energy
• A cosmographic analysis of holographic dark energy models
• Probing the imprints of generalized interacting dark energy on the growth of perturbations
• Reconstruction of the dark sectors' interaction: A model-independent inference and forecast from GW standard sirens
• Is it possible to obtain cosmic accelerated expansion through energy transfer between different energy densities?

Cited by in corpus (21)

• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Exploring the $H_0$ tension and the evidence of dark sector interaction from 2D BAO measurements
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Dark sector interaction and the supernova absolute magnitude tension
• A Consistent View of Interacting Dark Energy from Multiple CMB Probes
• Late time interacting cosmologies and the Hubble constant tension
• A double take on early and interacting dark energy from JWST
• Tightening the reins on non-minimal dark sector physics: Interacting Dark Energy with dynamical and non-dynamical equation of state
• Reconstruction of the dark sectors' interaction: A model-independent inference and forecast from GW standard sirens
• Exploration of interacting dynamical dark energy model with interaction term including the equation-of-state parameter: alleviation of the $H_0$ tension
• Background evolution and growth of structures in interacting dark energy through dynamical system analysis
• Interacting dark energy from the joint analysis of the power spectrum and bispectrum multipoles with the EFTofLSS
• IWDM: The fate of an interacting non-cold dark matter $-$ vacuum scenario
• Non-Linear Matter Power Spectrum Modeling in Interacting Dark Energy Cosmologies
• In search of an interaction in the dark sector through Gaussian Process and ANN approaches
• Hints of Neutrino Dark Matter scattering in the CMB? Constraints from the Marginalized and Profile Distributions
• On the interacting dark energy scenarios $-$ the case for Hubble constant tension
• Vainshtein screening in Horndeski theories nonminimally and kinetically coupled to ordinary matter
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Dissecting the $H_0$ and $S_8$ tensions with Planck + BAO + supernova type Ia in multi-parameter cosmologies
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions