The $H_0$ and $S_8$ tensions necessitate early and late time changes to $\Lambda$CDM

Abstract

An only early or only late time alteration to $\Lambda$CDM has been inadequate at resolving both the $H_0$ and $S_8$ tensions simultaneously; however, a combination of early and late time alterations to $\Lambda$CDM can provide a solution to both tensions. As an illustration, we examine a combined Early Dark Energy - Decaying Dark Matter model. While early dark energy has the ability to resolve the $H_0$ tension, it leads to a discrepancy in $S_8$ measurements. We show that the addition of decaying dark matter helps resolve the $S_8$ discrepancy that would otherwise be enhanced in an early dark energy model, while the latter is able to relieve the $H_0$ disagreement to within the 95th percentile interval. Our results show a preference for the combined model over $\Lambda$CDM with $\Delta \mathrm{AIC}=-6.72$, hinting that both early and late universe modifications may be necessary to address the cosmological tensions.

arXiv comment13 pages, 5 figures, 1 table

References in corpus (48)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Exploring the Expansion History of the Universe
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Early Dark Energy Can Resolve The Hubble Tension
• The Hubble Hunter's Guide
• Cosmological Constraints from the Clustering of the Sloan Digital Sky Survey DR7 Luminous Red Galaxies
• Superweakly Interacting Massive Particles
• The Cosmic Linear Anisotropy Solving System (CLASS) IV: Efficient implementation of non-cold relics
• The Neutrino Puzzle: Anomalies, Interactions, and Cosmological Tensions
• Early Dark Energy Does Not Restore Cosmological Concordance
• Indications of a late-time interaction in the dark sector
• A Lower Growth Rate from Recent Redshift Space Distortion Measurements than Expected from Planck
• Cosmological implications of ultra-light axion-like fields
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing
• Early dark energy from massive neutrinos -- a natural resolution of the Hubble tension
• Acoustic Dark Energy: Potential Conversion of the Hubble Tension
• Constraining Early Dark Energy with Large-Scale Structure
• Evolution of the $f{\sigma }_8$ tension with the Planck15/$\Lambda$CDM determination and implications for modified gravity theories
• New Early Dark Energy
• Planck 2018 results. VI. Cosmological parameters
• Reconciling CMB and structure growth measurements with dark energy interactions
• Late universe decaying dark matter can relieve the H_0 tension
• Reducing the $H_0$ and ${\sigma }_8$ tensions with Dark Matter-neutrino interactions
• Tension between the power spectrum of density perturbations measured on large and small scales
• Rock 'n' Roll Solutions to the Hubble Tension
• Is the Jeffreys' scale a reliable tool for Bayesian model comparison in cosmology?
• The Atacama Cosmology Telescope: Constraints on Pre-Recombination Early Dark Energy
• Converting non-relativistic dark matter to radiation
• Cosmological constraints on interacting dark energy with redshift-space distortion after Planck data
• GAIA Cepheid parallaxes and 'Local Hole' relieve $H_0$ tension
• Density perturbations for running vacuum: a successful approach to structure formation and to the ${\sigma }_8$-tension
• Non-Thermal Dark Matter Mimicking An Additional Neutrino Species In The Early Universe
• Light dark photon and fermionic dark radiation for the Hubble constant and the structure formation
• Dark Sector to Restore Cosmological Concordance
• Is there concordance within the concordance $\Lambda$CDM model?
• Residual Non-Abelian Dark Matter and Dark Radiation
• Cosmological constraints on late-universe decaying dark matter as a solution to the $H_0$ tension
• Dark matter with two- and many-body decays and supernovae type Ia
• Null test for interactions in the dark sector
• Axi-Higgs Cosmology
• Cosmological constraints to dark matter with two- and many-body decays
• p-wave Annihilating Dark Matter from a Decaying Predecessor and the Galactic Center Excess
• Late decaying 2-component dark matter scenario as an explanation of the AMS-02 positron excess
• Seven Problems with the Claims Related to the Hubble Tension in arXiv:1810.02595
• Implications of the $S_8$ tension for decaying dark matter with warm decay products
• Modified Emergent Dark Energy and its Astronomical Constraints