How close can an Inhomogeneous Universe mimic the Concordance Model?

Abstract

Recently, spatially inhomogeneous cosmological models have been proposed as an alternative to the LCDM model, with the aim of reproducing the late time dynamics of the Universe without introducing a cosmological constant or dark energy. This paper investigates the possibility of distinguishing such models from the standard LCDM using background or large scale structure data. It also illustrates and emphasizes the necessity of testing the Copernican principle in order to confront the tests of general relativity with the large scale structure.

15 pages, 7 figures

References in corpus (66)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• The Cosmological Constant and Dark Energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological parameters from SDSS and WMAP
• Weak Gravitational Lensing
• Large-Scale Structure of the Universe and Cosmological Perturbation Theory
• Cosmological Results from High-z Supernovae
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Cluster Abundance Constraints on Quintessence Models
• Cosmic Growth History and Expansion History
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• Very weak lensing in the CFHTLS Wide: Cosmology from cosmic shear in the linear regime
• Parameterized Beyond-Einstein Growth
• An inhomogeneous alternative to dark energy?
• Observational Constraints on Dark Energy and Cosmic Curvature
• A general test of the Copernican Principle
• Cosmic dynamics in the era of Extremely Large Telescopes
• Probing Cosmic Acceleration Beyond the Equation of State: Distinguishing between Dark Energy and Modified Gravity Models
• Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology
• Testing LCDM with the Growth Function δ(a): Current Constraints
• Separating Dark Physics from Physical Darkness: Minimalist Modified Gravity vs. Dark Energy
• Time drift of cosmological redshifts as a test of the Copernican principle
• The power spectrum of galaxies in the 2dF 100k redshift survey
• Large Scale Inhomogeneity Versus Source Evolution -- Can We Distinguish Them Observationally?
• The acceleration of the universe and the physics behind it
• The effect of inhomogeneous expansion on the supernova observations
• A Test of the Copernican Principle
• A covariant approach for perturbations of rotationally symmetric spacetimes
• Covariant Perturbations of Schwarzschild Black Holes
• Is dark energy the only solution to the apparent acceleration of the present universe?
• Mimicking Dark Energy with Lemaitre-Tolman-Bondi Models: Weak Central Singularities and Critical Points
• Geocentrism reexamined
• Differentiating dark energy and modified gravity with galaxy redshift surveys
• Redshift Distortions as a Probe of Gravity
• Next Generation Redshift Surveys and the Origin of Cosmic Acceleration
• Can we avoid dark energy?
• Scalar Perturbations on Lemaitre-Tolman-Bondi Spacetimes
• Nonlinear Structure Formation and "Apparent" Acceleration: an Investigation
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• Mapping Luminosity-Redshift Relationship to LTB Cosmology
• The VIMOS VLT Deep Survey - The evolution of galaxy clustering to z=2 from first epoch observations
• Dynamics of Silent Universes
• Perturbation Theory in Lemaitre-Tolman-Bondi Cosmology
• Falsifying Paradigms for Cosmic Acceleration
• Distinguishing Between Void Models and Dark Energy with Cosmic Parallax and Redshift Drift
• The time evolution of cosmological redshift as a test of dark energy
• Inhomogeneous spacetimes as a dark energy model
• Solving the Inverse Problem with Inhomogeneous Universes
• Testing the Copernican Principle via Cosmological Observations
• The electromagnetic signature of black hole ringdown
• Inhomogeneity-Induced Cosmic Acceleration in a Dust Universe
• Time drift of cosmological redshifts and its variance
• A Future Test of Gravitation Using Galaxy Cluster Velocities
• Rendering Dark Energy Void
• Exploring holographic dark energy model with Sandage-Loeb test
• Supernovae data and perturbative deviation from homogeneity
• Redshift spherical shell energy in isotropic Universes
• Can the cosmological constant be mimicked by smooth large-scale inhomogeneities for more than one observable?
• Testing homogeneity with galaxy number counts : light-cone metric and general low-redshift expansion for a central observer in a matter dominated isotropic universe without cosmological constant
• Distance-redshift relation in an isotropic inhomogeneous universe II: Spherically symmetric dust-shell universe
• Reconstructing Cosmological Matter Perturbations using Standard Candles and Rulers
• A Null Test of the Cosmological Constant

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• Dark Energy
• General Relativity and Cosmology: Unsolved Questions and Future Directions
• Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes
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• Observational constraints on inhomogeneous cosmological models without dark energy
• Precision cosmology defeats void models for acceleration
• The significance of the integrated Sachs-Wolfe effect revisited
• A new tension in the cosmological model from primordial deuterium?
• Real-time Cosmology
• Inhomogeneity effects in Cosmology
• The Cosmic Microwave Background in an Inhomogeneous Universe - why void models of dark energy are only weakly constrained by the CMB
• Redshift Drift in LTB Void Universes
• Observational constraints on the LLTB model
• Another look at redshift drift and the backreaction conjecture
• Tension in the Void: Cosmic Rulers Strain Inhomogeneous Cosmologies
• The Wall of Fundamental Constants
• Tests of General Relativity on Astrophysical Scales
• Exact spherically-symmetric inhomogeneous model with n perfect fluids
• Direction and redshift drifts for general observers and their applications in cosmology
• Redshift drift in an inhomogeneous universe: averaging and the backreaction conjecture
• The Metric of the Cosmos from Luminosity and Age Data
• 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
• Evolution of density perturbations in large void universe
• Constraining f(R) theories with cosmography
• Using Time Drift of Cosmological Redshifts to find the Mass-Energy Density of the Universe
• Evolution of linear perturbations in spherically symmetric dust spacetimes
• Testing LTB Void Models Without the Cosmic Microwave Background or Large Scale Structure: New Constraints from Galaxy Ages
• Evolution of linear perturbations in Lemaître-Tolman-Bondi void models
• Inverse Construction of the $\Lambda$LTB Model from a Distance-redshift Relation
• Finding a Spherically Symmetric Cosmology from Observations in Observational Coordinates -- Advantages and Challenges
• Two-point correlation function of density perturbations in a large void universe
• Spectral Distortion in a Radially Inhomogeneous Cosmology
• Cross-correlating Planck with VST ATLAS LRGs: a new test for the ISW effect in the Southern Hemisphere
• Comparison of two approximation schemes for solving perturbations in a LTB cosmological model
• Simulations of cm-wavelength Sunyaev-Zel'dovich galaxy cluster and point source blind sky surveys and predictions for the RT32/OCRA-f and the Hevelius 100-m radio telescope
• Newtonian self-gravitating system in a relativistic huge void universe model
• Redshift Drift fluctuations from N-body simulations
• Linear perturbations in spherically symmetric dust cosmologies including a cosmological constant
• Light propagation in linearly perturbed $\Lambda$LTB models
• Causal heat flow in Bianchi type-V universe