Coupled quintessence with a $\Lambda$CDM background: removing the ${\sigma }_8$ tension

Abstract

A well-known problem of the $\Lambda$CDM model is the tension between the relatively high level of clustering, as quantified by the parameter ${\sigma }_8$, found in cosmic microwave background experiments and the smaller one obtained from large-scale observations in the late Universe. In this paper we show that coupled quintessence, i.e. a single dark energy scalar field conformally coupled to dark matter through a constant coupling, can solve this problem if the background is taken to be identical to the $\Lambda$CDM one. We show that two competing effects arise. On one hand, the additional scalar force is attractive, and is therefore expected to increase the clustering. On the other, in order to obtain the same background as $\Lambda$CDM, coupled quintessence must have a smaller amount of dark matter near the present epoch. We show that the second effect is dominating today and leads to an overall slower growth. Comparing to redshift distortion data, we find that coupled quintessence with $\Lambda$CDM background solves the tension between early and late clustering. We find for the coupling $\beta$ and for ${\sigma }_8$ the best fit values $|\beta |=0.079_{-0.067}^{+0.059}$ and ${\sigma }_8=0.818_{-0.088}^{+0.115}$. These values also fit the lensing data from the KiDS-450 survey. We also estimate that the future missions SKA and Euclid will constrain $\beta$ with an error of $\pm 1.5\times 10^{-3}$ and for ${\sigma }_8$ of $\pm 1.8\times 10^{-3}$ at $1\sigma$ level.

8 pages, 6 figures. V2: Matches published version

References in corpus (10)

• Dynamics of dark energy
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• Coupled and Extended Quintessence: theoretical differences and structure formation
• Tension between the power spectrum of density perturbations measured on large and small scales
• Kinetic k-essence and Quintessence
• Density perturbations for running vacuum: a successful approach to structure formation and to the ${\sigma }_8$-tension
• Relaxing the ${\sigma }_8$-tension through running vacuum in the Universe
• Assisted coupled quintessence

Cited by in corpus (54)

• Challenges for $\Lambda$CDM: An update
• Non-minimal dark sector physics and cosmological tensions
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Testing $F(Q)$ gravity with redshift space distortions
• Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
• $H_0$ Tension, Phantom Dark Energy and Cosmological Parameter Degeneracies
• Field theoretic interpretations of interacting dark energy scenarios and recent observations
• Quantifying the $S_8$ tension with the Redshift Space Distortion data set
• A designer approach to $f(Q)$ gravity and cosmological implications
• Cosmology with the EFTofLSS and BOSS: dark energy constraints and a note on priors
• Tension of the $E_G$ statistic and RSD data with Planck/$\Lambda$CDM and implications for weakening gravity
• Coupled and uncoupled early dark energy, massive neutrinos and the cosmological tensions
• A double take on early and interacting dark energy from JWST
• On structure formation from a small-scales-interacting dark sector
• Tightening the reins on non-minimal dark sector physics: Interacting Dark Energy with dynamical and non-dynamical equation of state
• Measuring gravity at cosmological scales
• Toward a concordance teleparallel Cosmology I: Background Dynamics
• Observational constraints and predictions of the interacting dark sector with field-fluid mapping
• New MGCAMB tests of gravity with CosmoMC and Cobaya
• Interacting dark energy from the joint analysis of the power spectrum and bispectrum multipoles with the EFTofLSS
• Late-time evolution of the Universe within a two-scalar-field cosmological model
• Kinetically coupled dark energy
• Cosmological perturbations in the interacting dark sector: Mapping fields and fluids
• Conformally Coupled Tachyonic Dark Energy
• Gravitational Redshift Constraints on the Effective Theory of Interacting Dark Energy
• Dynamical stability in models where dark matter and dark energy are non-minimally coupled to curvature
• Scalar field dark matter and dark energy: a hybrid model for the dark sector
• Rescuing constraints on modified gravity using gravitational redshift in large-scale structure
• Growth of Matter Perturbations in the Bi-Galileons Field Model
• Modified Einstein versus Modified Euler for Dark Matter
• Disformally Coupled Quintessence
• A simple parametrisation for coupled dark energy
• Dark D-Brane Cosmology: from background evolution to cosmological perturbations
• Hints of Neutrino Dark Matter scattering in the CMB? Constraints from the Marginalized and Profile Distributions
• Measuring the distortion of time with relativistic effects in large-scale structure
• Is gravity getting weaker at low z? Observational evidence and theoretical implications
• Dissecting kinetically coupled quintessence: phenomenology and observational tests
• Dissipative quintessence, and its cosmological implications
• Cosmological framework for renormalization group extended gravity at the action level
• Reconstruction of Dynamical Dark Energy Potentials: Quintessence, Tachyon and interacting models
• Disentangling modified gravity from a dark force with gravitational redshift
• Spherical collapse in coupled quintessence with a $\Lambda$CDM background
• The CIDER simulations: Nonlinear structure formation in the Constrained Interacting Dark Energy Scenario
• Is there evidence for CIDER in the Universe?
• Global asymptotic dynamics of the cubic galileon interacting with dark matter
• Observational Constraints on Early Coupled Quintessence
• Wormholes with matter haunted by conformally coupled ghosts
• Constraining disformal couplings with Redshift Space Distortion
• Role of Spatial Curvature in a Dark Energy Interacting Model
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Halos of dark energy
• Modified Power law Inflation: solution to the graceful exit problem and improvement of dark energy models
• On the road to percent accuracy VI: the nonlinear power spectrum for interacting dark energy with baryonic feedback and massive neutrinos