Observational constraints on inhomogeneous cosmological models without dark energy

Abstract

It has been proposed that the observed dark energy can be explained away by the effect of large-scale nonlinear inhomogeneities. In the present paper we discuss how observations constrain cosmological models featuring large voids. We start by considering Copernican models, in which the observer is not occupying a special position and homogeneity is preserved on a very large scale. We show how these models, at least in their current realizations, are constrained to give small, but perhaps not negligible in certain contexts, corrections to the cosmological observables. We then examine non-Copernican models, in which the observer is close to the center of a very large void. These models can give large corrections to the observables which mimic an accelerated FLRW model. We carefully discuss the main observables and tests able to exclude them.

27 pages, 7 figures; invited contribution to CQG special issue "Inhomogeneous Cosmological Models and Averaging in Cosmology". Replaced to match the improved version accepted for publication. Appendix B and references added

References in corpus (58)

• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids
• A general test of the Copernican Principle
• Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology
• Inhomogeneous cosmological models: exact solutions and their applications
• Time drift of cosmological redshifts as a test of the Copernican principle
• On cosmological observables in a swiss-cheese universe
• A Test of the Copernican Principle
• Strong lensing optical depths in a \LambdaCDM universe
• CMB anisotropies seen by an off-center observer in a spherically symmetric inhomogeneous universe
• Living in a Void: Testing the Copernican Principle with Distant Supernovae
• Mimicking Dark Energy with Lemaitre-Tolman-Bondi Models: Weak Central Singularities and Critical Points
• Looking the void in the eyes - the kSZ effect in LTB models
• What is dust? - Physical foundations of the averaging problem in cosmology
• Can we avoid dark energy?
• Light-cone averages in a swiss-cheese universe
• Testing the Void against Cosmological data: fitting CMB, BAO, SN and H0
• Precision cosmology defeats void models for acceleration
• Scalar Perturbations on Lemaitre-Tolman-Bondi Spacetimes
• Backreaction: directions of progress
• The supernova Hubble diagram for off-center observers in a spherically symmetric inhomogeneous universe
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• Mapping Luminosity-Redshift Relationship to LTB Cosmology
• Strong lensing optical depths in a LCDM universe II: the influence of the stellar mass in galaxies
• Szekeres Swiss-Cheese model and supernova observations
• Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
• Inhomogeneity effects in Cosmology
• Toward physical cosmology: focus on inhomogeneous geometry and its non-perturbative effects
• Luminosity distance in "Swiss cheese" cosmology with randomized voids: I. Single void size
• The radial BAO scale and Cosmic Shear, a new observable for Inhomogeneous Cosmologies
• The Cosmic Microwave Background in an Inhomogeneous Universe - why void models of dark energy are only weakly constrained by the CMB
• Solving the Inverse Problem with Inhomogeneous Universes
• Linear kinetic Sunyaev-Zel'dovich effect and void models for acceleration
• Inhomogeneities in the universe
• Reconciling the local void with the CMB
• Is backreaction really small within concordance cosmology?
• Redshift Drift in LTB Void Universes
• Accurate Modeling of Weak Lensing with the sGL Method
• Swiss Cheese and a Cheesy CMB
• Cosmic spherical void via coarse-graining and averaging non-spherical structures
• Dark Energy or Apparent Acceleration Due to a Relativistic Cosmological Model More Complex than FLRW?
• Observational constraints on the LLTB model
• Back-reaction and effective acceleration in generic LTB dust models
• Cosmic Parallax: possibility of detecting anisotropic expansion of the universe by very accurate astrometry measurements
• Global gravitational instability of FLRW backgrounds - interpreting the dark sectors
• On light propagation in Swiss-Cheese cosmologies
• Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
• Large scale structure simulations of inhomogeneous LTB void models
• Large-scale inhomogeneities may improve the cosmic concordance of supernovae
• Weak Lensing Observables in the Halo Model
• The effect of inhomogeneities on the distance to the last scattering surface and the accuracy of the CMB analysis
• Analytical Estimate of the Effect of Spherical Inhomogeneities on Luminosity Distance and Redshift
• The Metric of the Cosmos from Luminosity and Age Data
• Spatial and temporal tuning in void models for acceleration
• Voids in the SDSS Galaxy Survey
• Quadra-Spectrum and Quint-Spectrum from Inflation and Curvaton Models
• Analytic formulae for the off-center CMB anisotropy in a general spherically symmetric universe

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• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Evidence for a ~300 Mpc Scale Under-density in the Local Galaxy Distribution
• Inhomogeneous cosmological models: exact solutions and their applications
• Establishing homogeneity of the universe in the shadow of dark energy
• What is dust? - Physical foundations of the averaging problem in cosmology
• Curvature vs Distances: testing the FLRW cosmology
• Real-time Cosmology
• Inhomogeneity effects in Cosmology
• Average expansion rate and light propagation in a cosmological Tardis spacetime
• Testing the Copernican principle by constraining spatial homogeneity
• Toward physical cosmology: focus on inhomogeneous geometry and its non-perturbative effects
• Tests of the CMB temperature-redshift relation, CMB spectral distortions and why adiabatic photon production is hard
• Tension in the Void: Cosmic Rulers Strain Inhomogeneous Cosmologies
• Can decaying modes save void models for acceleration?
• Complete solutions to the metric of spherically collapsing dust in an expanding spacetime with a cosmological constant
• Internal Robustness: systematic search for systematic bias in SN Ia data
• Relativistic numerical cosmology with Silent Universes
• Probing spatial homogeneity with LTB models: a detailed discussion
• Power-law solution for homogeneous and isotropic universe in $f(R,T)$ gravity
• Exact spherically-symmetric inhomogeneous model with n perfect fluids
• A void in the Hubble tension? The end of the line for the Hubble bubble
• The Copernican principle in light of the latest cosmological data
• Inhomogeneous cosmology and backreaction: Current status and future prospects
• Measuring our Peculiar Velocity by "Pre-deboosting" the CMB
• Perceiving the equation of state of Dark Energy while living in a Cold Spot
• Thermodynamic aspects of dark energy fluids
• Multiple non-spherical structures from the extrema of Szekeres scalars
• The isotropic blackbody CMB as evidence for a homogeneous universe
• Testing the Cosmic Anisotropy with Supernovae Data: Hemisphere Comparison and Dipole Fitting
• Gravitational entropies in LTB dust models
• Euclid: Forecast constraints on consistency tests of the $\Lambda$CDM model
• Uncertainty on w from large-scale structure
• Lemaitre-Tolman-Bondi dust solutions in f(R) gravity
• Towards statistically homogeneous and isotropic perfect fluid universes with cosmic backreaction
• Testing for a large local void by investigating the Near-Infrared Galaxy Luminosity Function
• The Metric of the Cosmos from Luminosity and Age Data
• Invariant characterization of the growing and decaying density modes in LTB dust models
• Extensive search for bias in SNIa data
• Some clarifications about Lemaître-Tolman models of the Universe used to deal with the dark energy problem
• Non-Spherical Szekeres models in the language of Cosmological Perturbations
• Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle
• On spherical dust fluctuations: the exact vs. the perturbative approach
• Weighed scalar averaging in LTB dust models, part I: statistical fluctuations and gravitational entropy
• Evolution of density perturbations in large void universe
• Age Problem in Lemaitre-Tolman-Bondi Void Models
• Spherically symmetric inhomogeneous model with Chaplygin gas
• Asymmetry in the reconstructed deceleration parameter
• On the relationship between mean observations, spatial averages and the Dyer-Roeder approximation in Einstein-Straus models
• Testing Homogeneity with Galaxy Star Formation Histories
• CMB seen through random Swiss Cheese
• Redshift drift in a universe with structure I: Lemaitre-Tolman-Bondi structures with arbitrary angle of entry of light
• Gravitational Lensing by a structure in a cosmological background
• Back Reaction from Walls
• Discriminating different models of luminosity-redshift distribution
• Structure formation in an anisotropic universe: Eulerian perturbation theory
• A novel approach to cosmological non-linearities as an effective fluid
• Direct Measurement of the Positive Acceleration of the Universe and Testing Inhomogeneous Models under Gravitational Wave Cosmology
• Angular distribution of cosmological parameters as a probe of inhomogeneities: a kinematic parametrisation
• A gradient expansion for cosmological backreaction
• Modified Regge calculus as an explanation of dark energy
• Averaged Lemaître-Tolman-Bondi dynamics
• Weighed scalar averaging in LTB dust models, part II: a formalism of exact perturbations
• Presence of anisotropic pressures in Lemaître-Tolman-Bondi cosmological models
• Physical geometry of the quasispherical Szekeres models
• DESIgning concordant distances in the age of precision cosmology: the impact of density fluctuations
• Stephani Cosmology: Entropically Viable But Observationally Challenged
• Euclid: Testing the Copernican principle with next-generation surveys
• Conserved Quantities in Lemaitre-Tolman-Bondi Cosmology
• Evolution of linear perturbations in Lemaître-Tolman-Bondi void models
• New Classes of Spherically Symmetric, Inhomogeneous Cosmological Models
• Simple inhomogeneous cosmological (toy) models
• Testing homogeneity of the galaxy distribution in the SDSS using Renyi entropy
• Taylor expansion of luminosity distance in Szekeres cosmological models: Effects of local structures evolution on cosmographic parameters
• Generalized Swiss-Cheese Cosmologies II: Spherical Dust
• Relativistic virial relation for cosmological structures
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• Two-point correlation function of density perturbations in a large void universe
• Point mass Cosmological Black Holes
• Intrinsic energy of Lemaître-Tolman-Bondi models and cosmological implications
• Off-center observers versus supernovae in inhomogeneous pressure universes
• Constraining Chaplygin models using diffuse supernova neutrino background
• Low red-shift effects of local structure on the Hubble parameter in presence of a cosmological constant
• The fractal bubble model with a cosmological constant
• Reconstructing the metric of the local Universe from number counts observations
• Inhomegeneous cosmological models and fine-tuning of the initial state
• Large Scale Cosmological Anomalies and Inhomogeneous Dark Energy
• Newtonian self-gravitating system in a relativistic huge void universe model
• The effect of cosmic inhomogeneities on the average cosmological dynamics
• Coordinate independent approach to the calculation of the effects of local structure on the luminosity distance
• How large is the contribution of cosmic web to ${\Omega }_{\Lambda }$ ? A preliminary study on a novel inhomogenous model
• Linear perturbations in spherically symmetric dust cosmologies including a cosmological constant
• Light propagation in linearly perturbed $\Lambda$LTB models