Toward a simultaneous resolution of the $H_0$ and $S_8$ tensions: early dark energy and an interacting dark sector model

Abstract

The tension between the Hubble constant ($H_0$) inferred from the cosmic microwave background (CMB) and that measured from late-time observations, such as the local distance ladder, is a major challenge in modern cosmology. Early dark energy (EDE) has been proposed as a possible resolution to the $H_0$ tension, but it typically worsens the $S_8$ tension by enhancing the small-scale matter power spectrum due to an increased cold dark matter density. To address this issue, we propose a model that combines EDE with an interacting dark energy-dark matter (iDEDM) scenario, and investigate whether this mixed model can simultaneously resolve both tensions. We find that the DE-DM interaction suppress the growth of structure and reduce $S_8$, while EDE contributes to increase $H_0$, although less effectively than in the EDE-only case. Our MCMC analysis using Planck 2018, DESI BAO, DES, Pantheon+, and SH0ES data shows that the mixed model provides modest improvements in both tensions, although it does not fully resolve either. This limitation appears to stem from the fact that both EDE and iDEDM independently favor a higher present-day matter density, which reduces the angular diameter distance and limits the degree to which EDE can lower the sound horizon.

11 pages, 5 figures, 2tables v2: Corrected prior table for $H_0$. Removed Figure 6 and related discussion, as the $f{\sigma }_8(z)$ data points used were not based on published tabulated values. We apologize for the oversight

References in corpus (50)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Pantheon+ Analysis: Cosmological Constraints
• A gravitational-wave standard siren measurement of the Hubble constant
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Measurements of the Hubble Constant: Tensions in Perspective
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• On the Hubble constant tension in the SNe Ia Pantheon sample
• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Early Dark Energy Does Not Restore Cosmological Concordance
• Constraining Early Dark Energy with Large-Scale Structure
• On the evolution of the Hubble constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: a feasibility study for GRB-cosmology in 2030
• Why reducing the cosmic sound horizon alone can not fully resolve the Hubble tension
• Consistency tests of $\Lambda$CDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension
• $H_0$ Tension, Phantom Dark Energy and Cosmological Parameter Degeneracies
• Early dark energy is not excluded by current large-scale structure data
• Is there an early Universe solution to Hubble tension?
• Interacting Dark Energy after DESI Baryon Acoustic Oscillation measurements
• Early dark energy resolution to the Hubble tension in light of weak lensing surveys and lensing anomalies
• Dark energy from the string axiverse
• Tensions in the dark: shedding light on Dark Matter-Dark Energy interactions
• Unified framework for Early Dark Energy from $\alpha$-attractors
• Small Magellanic Cloud Cepheids Observed with the Hubble Space Telescope Provide a New Anchor for the SH0ES Distance Ladder
• Constraints on Interacting Dark Energy Models from the DESI Baryon Acoustic Oscillation and DES Supernovae Data
• Using The Baryonic Tully-Fisher Relation to Measure $H_o$
• Implications for the Hubble tension from the ages of the oldest astrophysical objects
• Early recombination as a solution to the $H_0$ tension
• TDCOSMO. XII. Improved Hubble constant measurement from lensing time delays using spatially resolved stellar kinematics of the lens galaxy
• Can late-time extensions solve the $H_0$ and ${\sigma }_8$ tensions?
• Relieving the $H_0$ tension with a new interacting dark energy model
• New constraints on interacting dark energy from DESI DR2 BAO observations
• Sensitivity of the Hubble Constant Determination to Cepheid Calibration
• A Consistent View of Interacting Dark Energy from Multiple CMB Probes
• The Hubble Tension Revisited: Additional Local Distance Ladder Uncertainties
• Quantifying the $S_8$ tension and evidence for interacting dark energy from redshift-space distortion measurements
• A double take on early and interacting dark energy from JWST
• Multidimensionality of the Hubble tension: the roles of ${\Omega }_m$ and ${\omega }_c$
• Combining pre- and post-recombination new physics to address cosmological tensions: case study with varying electron mass and sign-switching cosmological constant
• On the dynamics of a dark sector coupling
• Early Dark Energy with Power-law F(R) Gravity
• Sign Switching in Dark Sector Coupling Interactions as a Candidate for Resolving Cosmological Tensions
• Reconnaissance with JWST of the J-region Asymptotic Giant Branch in Distance Ladder Galaxies: From Irregular Luminosity Functions to Approximation of the Hubble Constant
• Dark Energy as a Critical Phenomenon: a Resolution for Hubble Tension
• Dark energy and matter interacting scenario to relieve $H_0$ and $S_8$ tensions
• Reconciling $S_8$: Insights from Interacting Dark Sectors
• Towards alleviating the $H_0$ and $S_8$ tensions with Early Dark Energy - Dark Matter drag
• Constraints on interacting dark energy revisited: implications for the Hubble tension
• Early dark energy constraints with late-time expansion marginalization
• The frozen vanilla model: Exploring dark sector interactions with delta effective theories

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• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
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• Updated Cosmological Constraints from 2D BAO Measurements: A New Compilation and Comparison with DESI DR2
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