Cosmic Degeneracies III: N-body Simulations of Interacting Dark Energy with Non-Gaussian Initial Conditions

Abstract

We perform for the first time N-body simulations of Interacting Dark Energy assuming non-Gaussian initial conditions, with the aim of investigating possible degeneracies of these two theoretically independent phenomena in different observational probes. We focus on the large-scale matter distribution, as well as on the statistical and structural properties of collapsed halos and cosmic voids. On very large scales, we show that it is possible to choose the Interaction and non-Gaussian parameters such that their effects on the halo power spectrum cancel, and the power spectrum is indistinguishable from a $\mathrm{\Lambda CDM}$ model. On small scales, measurements of the non-linear matter power spectrum, halo-matter bias, halo and subhalo mass function and cosmic void number function validate the degeneracy determined on large scales. However, the internal structural properties of halos and cosmic voids, namely halo concentration-mass relation and void density profile, are very different from those measured in the $\mathrm{\Lambda CDM}$ model, thereby breaking the degeneracy. In practice, the values of ${\mathrm{f}}_{\mathrm{NL}}$ required to cancel the effect of interaction are already ruled by observations. Our results show in principle that the combination of large- and small-scale probes is needed to constrain Interacting Dark Energy and Primordial non-Gaussianity separately.

arXiv comment14 pages, 9 figures, Version accepted by MNRAS

References in corpus (105)

• Planck 2015 results. XIII. Cosmological parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The cosmological simulation code GADGET-2
• Efficient Computation of CMB anisotropies in closed FRW models
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Populating a cluster of galaxies - I. Results at z=0
• Cosmology and the Fate of Dilatation Symmetry
• The Aquarius Project: the subhalos of galactic halos
• Coupled Quintessence
• Generating the curvature perturbation without an inflaton
• Non-Gaussianity from Inflation: Theory and Observations
• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• Large-Scale Galaxy Bias
• The subhalo populations of LCDM dark haloes
• CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Accurate universal models for the mass accretion histories and concentrations of dark matter halos
• Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
• Cosmic Confusion: Degeneracies among Cosmological Parameters Derived from Measurements of Microwave Background Anisotropies
• The effect of primordial non-Gaussianity on halo bias
• Planck 2015 results. XIV. Dark energy and modified gravity
• ZOBOV: a parameter-free void-finding algorithm
• Nonminimal coupling and quintessence
• Indications of a late-time interaction in the dark sector
• The abundance of high-redshift objects as a probe of non-Gaussian initial conditions
• Large-scale clustering of galaxies in general relativity
• Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures
• A Cosmic Watershed: the WVF Void Detection Technique
• The Scale Dependence of Halo and Galaxy Bias: Effects in Real Space
• Linear and non-linear perturbations in dark energy models
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• Scale-dependent bias induced by local non-Gaussianity: A comparison to N-body simulations
• Halo mass function and scale-dependent bias from N-body simulations with non-Gaussian initial conditions
• Next Generation Cosmology: Constraints from the Euclid Galaxy Cluster Survey
• Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure
• Coupled and Extended Quintessence: theoretical differences and structure formation
• Halo Stochasticity from Exclusion and non-linear Clustering
• Growing Matter
• Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
• Tracing the Dark Matter Sheet in Phase Space
• Interacting Dark Energy -- constraints and degeneracies
• Minimizing the stochasticity of halos in large-scale structure surveys
• Testing the Interaction between Dark Energy and Dark Matter with Planck Data
• Cosmology with massive neutrinos I: towards a realistic modeling of the relation between matter, haloes and galaxies
• New constraints on Coupled Dark Energy from Planck
• Large-scale non-Gaussian mass function and halo bias: tests on N-body simulations
• Models of coupled dark matter to dark energy
• The Clustering of Galaxies in SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: Constraints on Primordial Non-Gaussianity
• Primordial non-Gaussianity from the large scale structure
• Constraining Running Non-Gaussianity
• An algorithm for the direct reconstruction of the dark matter correlation function from weak lensing and galaxy clustering
• The dark degeneracy: On the number and nature of dark components
• Constraining ultra large-scale cosmology with multiple tracers in optical and radio surveys
• Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos
• Disentangling non-Gaussianity, bias and GR effects in the galaxy distribution
• Improved Primordial Non-Gaussianity Constraints from Measurements of Galaxy Clustering and the Integrated Sachs-Wolfe Effect
• Constraints on primordial non-Gaussianity from 800,000 photometric quasars
• Time dependent couplings in the dark sector: from background evolution to nonlinear structure formation
• The Substructure Hierarchy in Dark Matter Haloes
• Hunting down horizon-scale effects with multi-wavelength surveys
• Velocities as a probe of dark sector interactions
• The dark degeneracy and interacting cosmic components
• The impact of baryonic physics on the subhalo mass function and implications for gravitational lensing
• Formation times, mass growth histories and concentrations of dark matter haloes
• A comparison of the evolution of the density field in perturbation theory and numerical simulations - II Counts in cells analysis
• The CoDECS project: a publicly available suite of cosmological N-body simulations for interacting dark energy models
• Can f(R) Modified Gravity Theories Mimic a LCDM Cosmology?
• Evolution of Massive Haloes in non-Gaussian Scenarios
• N-body simulations with generic non-Gaussian initial conditions I: Power Spectrum and halo mass function
• The Void Abundance with Non-Gaussian Primordial Perturbations
• On the linearity of tracer bias around voids
• Clarifying the effects of interacting dark energy on linear and nonlinear structure formation processes
• The Non-Gaussian Halo Mass Function with fNL, gNL and tauNL
• Cosmic voids in coupled dark energy cosmologies: the impact of halo bias
• N-body simulations with generic non-Gaussian initial conditions II: Halo bias
• High-z massive clusters as a test for dynamical coupled dark energy
• The latitude dependence of the rotation measures of NVSS sources
• Large-scale 3D galaxy correlation function and non-Gaussianity
• Early massive clusters and the bouncing coupled dark energy
• Galaxy and Mass Assembly (GAMA): Redshift Space Distortions from the Clipped Galaxy Field
• Cosmological Parameters Degeneracies and Non-Gaussian Halo Bias
• Probing the imprint of interacting dark energy on very large scales
• How to Distinguish Dark Energy and Modified Gravity?
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Clustering and redshift-space distortions in interacting dark energy cosmologies
• Primordial non-Gaussianities after Planck 2015: an introductory review
• The life and death of cosmic voids
• Can $f(T)$ gravity theories mimic $\Lambda$CDM cosmic history
• The halo mass function in interacting Dark Energy models
• Disantangling the effects of Doppler velocity and primordial non-Gaussianity in galaxy power spectra
• Joint cosmological parameters forecast from CFHTLS-cosmic shear and CMB data
• Ringing the initial Universe: the response of overdensity and transformed-density power spectra to initial spikes
• Multiple Dark Matter as a self-regulating mechanism for dark sector interactions
• Characterizing dark interactions with the halo mass accretion history and structural properties
• Disentangling interacting dark energy cosmologies with the three-point correlation function
• Cosmic Degeneracy with Dark Energy Equation of State
• CMB constraints on running non-Gaussianity
• Indistinguishability of Warm Dark Matter, Modified Gravity, and Coupled Cold Dark Matter
• Constraints from growth-rate data on some coupled dark energy models mimicking a $\Lambda CDM$ expansion
• Degeneracy between primordial non-Gaussianity and interaction in the dark sector
• Cosmic shear statistics in cosmologies with non-Gaussian initial conditions

Cited by in corpus (7)

• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• Large-scale dark matter simulations
• Remedy of some cosmological tensions via effective phantom-like behavior of interacting vacuum energy
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Dark Matter-Dark Energy Interaction and the Shape of Cosmic Voids
• Non-Linear Matter Power Spectrum Modeling in Interacting Dark Energy Cosmologies
• One-loop power spectrum corrections in interacting dark energy cosmologies