The Impact of Coupled Dark Energy Cosmologies on the High-Redshift Intergalactic Medium

Abstract

We present an analysis of high-resolution hydrodynamical N-body simulations of coupled dark energy cosmologies which focusses on the statistical properties of the transmitted Lyman-alpha flux in the high-redshift intergalactic medium (IGM). In these models the growth of the diffuse cosmic web differs from the standard LCDM case: the density distribution is skewed towards underdense regions and the matter power spectra are typically larger (in a scale dependent way). These differences are also appreciable in the Lyman-alpha flux and are larger than 5% (10%) at z=2-4 in the flux probability distribution function (pdf) for high transmissivity regions and for values of the coupling parameter β= 0.08 (β= 0.2). The flux power spectrum is also affected at the ~2% (~ 5-10%) level for β= 0.08 (β= 0.2) in a redshift dependent way. We infer the behaviour of flux pdf and flux power for a reasonable range of couplings and present constraints using present high and low resolution data sets. We find an upper limit β< 0.15 (at 2 sigma confidence level), which is obtained using only IGM data and is competitive with those inferred from other large scale structure probes.

6 pages, 2 figures. Minor revisions. Published in MNRAS Letters

References in corpus (11)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmology and the Fate of Dilatation Symmetry
• How cold is cold dark matter? Small scales constraints from the flux power spectrum of the high-redshift Lyman-alpha forest
• Coupled and Extended Quintessence: theoretical differences and structure formation
• Constraining Interactions in Cosmology's Dark Sector
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
• Tidal Tails Test the Equivalence Principle in the Dark Sector
• Coupled dark matter-dark energy in light of near Universe observations
• Observational constraints on the linear fluctuation growth rate
• Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy?

Cited by in corpus (31)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• Interacting Dark Energy -- constraints and degeneracies
• Cosmological constraints on interacting dark energy with redshift-space distortion after Planck data
• The CoDECS project: a publicly available suite of cosmological N-body simulations for interacting dark energy models
• Clarifying the effects of interacting dark energy on linear and nonlinear structure formation processes
• Remedy of some cosmological tensions via effective phantom-like behavior of interacting vacuum energy
• High-z massive clusters as a test for dynamical coupled dark energy
• The latitude dependence of the rotation measures of NVSS sources
• Early massive clusters and the bouncing coupled dark energy
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Simulating Momentum Exchange in the Dark Sector
• On the Effects of Coupled Scalar Fields on Structure Formation
• New Limits on Coupled Dark Energy from Planck
• Multiple Dark Matter as a self-regulating mechanism for dark sector interactions
• Maps of CMB lensing deflection from N-body simulations in Coupled Dark Energy Cosmologies
• Can Coupled Dark Energy Speed Up the Bullet Cluster?
• The Effect of Coupled Dark Energy on the Alignment between Dark Matter and Galaxy Distributions in Clusters
• Disentangling dark sector models using weak lensing statistics
• Structure formation in Multiple Dark Matter cosmologies with long-range scalar interactions
• Dark Matter-Dark Energy Interaction and the Shape of Cosmic Voids
• Effective dark energy equation of state in interacting dark energy models
• Hydrodynamical simulations of coupled and uncoupled quintessence models II: Galaxy clusters
• Dark Sector Coupling Bends the Superclusters
• The Spin Alignments in Galaxy Pairs as a Test of Bouncing Coupled Dark Energy
• Euclid preparation. Simulations and nonlinearities beyond $\Lambda$CDM. 1. Numerical methods and validation
• Degeneracy between warm and coupled cold dark matter: A clarifying note
• Constraining Violations of the Weak Equivalence Principle in the Dark Sector
• Interacting Quintessence and Growth of Structure