Interacting Dark Energy -- constraints and degeneracies

Abstract

In standard cosmologies, dark energy interacts only gravitationally with dark matter. There could be a non-gravitational interaction in the dark sector, leading to changes in the effective DE equation of state, in the redshift dependence of the DM density and in structure formation. We use CMB, BAO and SNIa data to constrain a model where the energy transfer in the dark sector is proportional to the DE density. There are two subclasses, defined by the vanishing of momentum transfer either in the DM or the DE frame. We conduct a Markov-Chain Monte-Carlo analysis to obtain best-fit parameters. The background evolution allows large interaction strengths, and the constraints from CMB anisotropies are weak. The growth of DM density perturbations is much more sensitive to the interaction, and can deviate strongly from the standard case. However, the deviations are degenerate with galaxy bias and thus more difficult to constrain. Interestingly, the ISW signature is suppressed since the non-standard background evolution can compensate for high growth rates. We also discuss the partial degeneracy between interacting DE and modified gravity, and how this can be broken.

12 pages, 18 figures. Clarification on instabilities. Accepted by PRD

References in corpus (35)

• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Large-scale instability in interacting dark energy and dark matter fluids
• Dynamics of dark energy with a coupling to dark matter
• Modified gravity models of dark energy
• Dynamics of interacting dark energy
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• Stability of the curvature perturbation in dark sectors' mutual interacting models
• Dark Interactions and Cosmological Fine-Tuning
• Challenges for scaling cosmologies
• Signature of the interaction between dark energy and dark matter in galaxy clusters
• Cosmological coincidence problem in interacting dark energy models
• Matter density perturbations in interacting quintessence models
• The Growth of Structure in Interacting Dark Energy Models
• Testing the interaction between dark energy and dark matter via latest observations
• Adiabatic instability in coupled dark energy-dark matter models
• Coupled dark matter-dark energy in light of near Universe observations
• The dark degeneracy and interacting cosmic components
• On the large-scale instability in interacting dark energy and dark matter fluids
• Dynamics of Interacting Quintessence Models: Observational Constraints
• Dark energy with non-adiabatic sound speed: initial conditions and detectability
• Dark Coupling and Gauge Invariance
• Scattering of Dark Matter and Dark Energy
• Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy?
• The latitude dependence of the rotation measures of NVSS sources
• How to Distinguish Dark Energy and Modified Gravity?
• Late universe dynamics with scale-independent linear couplings in the dark sector
• The Adiabatic Instability on Cosmology's Dark Side
• Slow-Roll Suppression of Adiabatic Instabilities in Coupled Scalar Field-Dark Matter Models
• Interacting Cosmological Fluids and the Coincidence Problem
• Future weak lensing constraints in a dark coupled universe
• Probing Dark Energy at Galactic and Cluster Scales
• Linear and non-Linear Instabilities in Unified Dark Energy Models
• Constraining the interacting dark energy models from weak gravity conjecture and recent observations
• A gauge-invariant approach to interactions in the dark sector

Cited by in corpus (127)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Non-minimal dark sector physics and cosmological tensions
• Tale of stable interacting dark energy, observational signatures, and the $H_0$ tension
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Interacting scenarios with dynamical dark energy: observational constraints and alleviation of the $H_0$ tension
• Reconciling CMB and structure growth measurements with dark energy interactions
• Interacting dark energy with time varying equation of state and the $H_0$ tension
• New constraints on Coupled Dark Energy from Planck
• Models of coupled dark matter to dark energy
• DBI Galileons in the Einstein Frame: Local Gravity and Cosmology
• Constraints on Interacting Dark Energy Models from the DESI Baryon Acoustic Oscillation and DES Supernovae Data
• Cosmological constraints on interacting dark energy with redshift-space distortion after Planck data
• Large-scale Stability and Astronomical Constraints for Coupled Dark-Energy Models
• Observational constraints on sign-changeable interaction models and alleviation of the $H_0$ tension
• Nonlinear interacting cosmological models after Planck 2018 legacy release and the $H_0$ tension
• Field theoretic interpretations of interacting dark energy scenarios and recent observations
• Novel approach towards the large-scale stable Interacting Dark-Energy models and their Astronomical Bounds
• Astronomical bounds on a cosmological model allowing a general interaction in the dark sector
• Listening to the sound of dark sector interactions with gravitational wave standard sirens
• 2021-$H_0$ Odyssey: Closed, Phantom and Interacting Dark Energy Cosmologies
• Large-scale stable interacting dark energy model: Cosmological perturbations and observational constraints
• Parametrized Post-Friedmann Framework for Interacting Dark Energy
• Dark calling Dark: Interaction in the dark sector in presence of neutrino properties after Planck CMB final release
• Dark sectors with dynamical coupling
• Exploring the full parameter space for an interacting dark energy model with recent observations including redshift-space distortions: Application of the parametrized post-Friedmann approach
• Dark sector interaction and the supernova absolute magnitude tension
• Testing coupled dark energy with large scale structure observation
• All-inclusive interacting dark sector cosmologies
• Testing models of vacuum energy interacting with cold dark matter
• Covariantizing the interaction between dark energy and dark matter
• Effects of Anisotropic Stress in Interacting Dark Matter - Dark Energy Scenarios
• Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
• Revisit of the interacting holographic dark energy model after Planck 2015
• Soundness of Dark Energy properties
• Remedy of some cosmological tensions via effective phantom-like behavior of interacting vacuum energy
• Model-agnostic assessment of dark energy after DESI DR1 BAO
• Cosmological observational constraints on the power law $f(Q)$ type modified gravity theory
• Reconstruction of the Dark Energy equation of state
• Coupled dark energy with perturbed Hubble expansion rate
• Constraints on interacting dark energy models through cosmic chronometers and Gaussian process
• Prospects for Constraining Interacting Dark Energy Models with 21 cm Intensity Mapping Experiments
• Dynamics of nonlinear interacting dark energy models
• Cosmological constraints on an exponential interaction in the dark sector
• Nonlinear Chaplygin Gas Cosmologies
• A double take on early and interacting dark energy from JWST
• Cosmological constraints on coupled dark energy
• Dark D-brane Cosmology
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Probing the imprint of interacting dark energy on very large scales
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Implications of the possible 21-cm line excess at cosmic dawn on dynamics of interacting dark energy
• Large-scale (in-) stability Analysis of an Exactly Solved Coupled Dark-Energy Model
• Constraints on active and sterile neutrinos in an interacting dark energy cosmology
• Clustering and redshift-space distortions in interacting dark energy cosmologies
• Probing the sign-changeable interaction between dark energy and dark matter with DESI baryon acoustic oscillations and DES supernovae data
• Understanding the phenomenology of interacting dark energy scenarios and their theoretical bounds
• Search for sterile neutrinos in a universe of vacuum energy interacting with cold dark matter
• Late-Time constraints on Interacting Dark Energy: Analysis independent of $H_0$, $r_d$ and $M_B$
• Probing the imprints of generalized interacting dark energy on the growth of perturbations
• Constraining interacting dark energy with CMB and BAO future surveys
• Dynamical Dark sectors and Neutrino masses and abundances
• Tightening the reins on non-minimal dark sector physics: Interacting Dark Energy with dynamical and non-dynamical equation of state
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy
• Prospects for probing the interaction between dark energy and dark matter using gravitational-wave dark sirens with neutron star tidal deformation
• Probing the sign-changeable interaction between dark energy and dark matter with current observations
• The halo mass function in interacting Dark Energy models
• Forecasting Interacting Vacuum-Energy Models using Gravitational Waves
• Exploration of interacting dynamical dark energy model with interaction term including the equation-of-state parameter: alleviation of the $H_0$ tension
• Models of vacuum energy interacting with cold dark matter: Constraints and comparison
• A model-independent reconstruction of dark sector interactions
• 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
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Probing the interaction between dark energy and dark matter with future fast radio burst observations
• Structure formation in Multiple Dark Matter cosmologies with long-range scalar interactions
• A comprehensive forecast for cosmological parameter estimation using joint observations of gravitational waves and short $\gamma$-ray bursts
• CMB and matter power spectra with non-linear dark-sector interactions
• J-PAS: forecasts on interacting vacuum energy models
• Reexploration of interacting holographic dark energy model: Cases of interaction term excluding the Hubble parameter
• Effective dark energy equation of state in interacting dark energy models
• IDECAMB: an implementation of interacting dark energy cosmology in CAMB
• Cosmic sign-reversal: non-parametric reconstruction of interacting dark energy with DESI DR2
• Measuring cosmic curvature with non-CMB observations
• Interacting dark sector from the trace-free Einstein equations: cosmological perturbations with no instability
• Diagnosing Tsallis Holographic Dark Energy models with interactions
• Perturbations for transient acceleration
• Discrimination between Lambda-CDM, quintessence, and modified gravity models using wide area surveys
• Raytracing simulations of coupled dark energy models
• Differentiating dark interactions with perturbation
• III. Interacting Dark Energy: Summary of Models, Pathologies, and Constraints
• Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
• Density perturbation in an interacting holographic dark energy model
• On the interacting dark energy scenarios $-$ the case for Hubble constant tension
• Forecast Analysis on Interacting Dark Energy Models from Future Generation PICO and DESI Missions
• Unphysical properties in a class of interacting dark energy models
• Multi-fluid cosmology in Einstein gravity: analytical solutions
• Rapid Oscillatory quintessence with variable equation of state parameter in non minimal derivative coupling model
• Power-Law and Logarithmic Entropy-Corrected Ricci Viscous Dark Energy and Dynamics of Scalar Fields
• Constraints on $\Lambda (t)$-cosmology with power law interacting dark sectors
• Evolution of shifted cosmological parameter and shifted dust matter in a two-phase tachyonic field universe
• Revisiting the Instability Problem of Interacting Dark Energy Model in the Parametrized Post-Friedmann Framework
• Interacting Agegraphic Dark Energy Model in DGP Braneworld Cosmology: Dynamical System Approach
• Chameleon Mechanism in Scalar Nonmetricity Cosmology
• Degeneracy between primordial non-Gaussianity and interaction in the dark sector
• Cosmic Degeneracies III: N-body Simulations of Interacting Dark Energy with Non-Gaussian Initial Conditions
• I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Stability analysis of an interacting holographic dark energy model
• Interacting parametrized post-Friedmann method
• Phantom crossing or dark interaction?
• Cosmological Constraints on the Phenomenological Interacting Dark Energy Model with Fermi Gamma-Ray Bursts and DESI DR2
• Late-time Background Constraints on Linear and Non-linear Interacting Dark Energy after DESI DR2
• The Distinguishability of Interacting Dark Energy from Modified Gravity
• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
• Non-trivial time crystal-like ground state for gravitational perturbation in quadratic gravity
• Perturbation in an interacting dark universe
• Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
• The frozen vanilla model: Exploring dark sector interactions with delta effective theories
• Interacting Quintessence and Growth of Structure
• Qualitative probe of interacting dark energy with redshift-space distortions
• Dissecting the $H_0$ and $S_8$ tensions with Planck + BAO + supernova type Ia in multi-parameter cosmologies
• Phantom cosmology with arbitrary potential: New accelerating scaling attractors
• Perturbations In Some Dark Energy Models
• Constraints on the Modified Emergent Dark Energy Model Using DESI DR2 BAO
• $G_3$ -- interacting scalar tensor dark energy