Large Scale Inhomogeneity Versus Source Evolution -- Can We Distinguish Them Observationally?

Abstract

We reconsider the issue of proving large scale spatial homogeneity of the universe, given isotropic observations about us and the possibility of source evolution both in numbers and luminosities. Two theorems make precise the freedom available in constructing cosmological models that will fit the observations. They make quite clear that homogeneity cannot be proven without either a fully determinate theory of source evolution, or availability of distance measures that are independent of source evolution. We contrast this goal with the standard approach that assumes spatial homogeneity a priori, and determines source evolution functions on the basis of this assumption.

mn style, mn.sty file included, mn.sty file removed

Cited by in corpus (120)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Dark Energy
• Dark Energy from structure: a status report
• An inhomogeneous alternative to dark energy?
• Modified Gravity-GADGET: A new code for cosmological hydrodynamical simulations of modified gravity models
• Lemaitre-Tolman-Bondi model and accelerating expansion
• Inhomogeneous cosmological models: exact solutions and their applications
• Time drift of cosmological redshifts as a test of the Copernican principle
• Accelerated expansion from structure formation
• The acceleration of the universe and the physics behind it
• The effect of inhomogeneous expansion on the supernova observations
• The cosmological constant from the ghost. A toy model
• Inhomogeneity and the foundations of concordance cosmology
• Living in a Void: Testing the Copernican Principle with Distant Supernovae
• Model independent tests of the standard cosmological model
• Mimicking Dark Energy with Lemaitre-Tolman-Bondi Models: Weak Central Singularities and Critical Points
• Establishing homogeneity of the universe in the shadow of dark energy
• Looking the void in the eyes - the kSZ effect in LTB models
• Observational constraints on inhomogeneous cosmological models without dark energy
• The supernova Hubble diagram for off-center observers in a spherically symmetric inhomogeneous universe
• Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content
• A (giant) void is not mandatory to explain away dark energy with a Lemaitre - Tolman model
• The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models
• The Effect of Large-Scale Inhomogeneities on the Luminosity Distance
• Perturbation Theory in Lemaitre-Tolman-Bondi Cosmology
• Light Propagation and Large-Scale Inhomogeneities
• Cosmological background solutions and cosmological backreactions
• Exploring cosmic homogeneity with the BOSS DR12 galaxy sample
• Distinguishing Between Void Models and Dark Energy with Cosmic Parallax and Redshift Drift
• A 14 $h^{-3}$ Gpc${}^3$ study of cosmic homogeneity using BOSS DR12 quasar sample
• 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
• A new stochastic approach to cumulative weak lensing
• Statistics of extreme objects in the Juropa Hubble Volume simulation
• Testing the Copernican Principle via Cosmological Observations
• Shrinking II -- The Distortion of the Area Distance-Redshift Relation in Inhomogeneous Isotropic Universes
• How close can an Inhomogeneous Universe mimic the Concordance Model?
• Observational constraints on the LLTB model
• Cosmological Acceleration and Gravitational Collapse
• The cosmological constant as a manifestation of the conformal anomaly?
• Undermining the Cosmological Principle: Almost Isotropic Observations in Inhomogeneous Cosmologies
• Dark energy as a mirage
• Tension in the Void: Cosmic Rulers Strain Inhomogeneous Cosmologies
• Inhomogeneity-Induced Cosmic Acceleration in a Dust Universe
• Alternative Methods of Describing Structure Formation in the Lemaitre-Tolman Model
• Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
• Virialisation-induced curvature as a physical explanation for dark energy
• Supernovae Ia observations in the Lemaitre--Tolman model
• Large scale structure simulations of inhomogeneous LTB void models
• Imitating accelerated expansion of the Universe by matter inhomogeneities - corrections of some misunderstandings
• Geodesic-light-cone coordinates and the Bianchi I spacetime
• Obtaining the spacetime metric from cosmological observations
• What the small angle CMB really tells us about the curvature of the Universe
• Rendering Dark Energy Void
• Explicit Cosmological Coarse Graining via Spatial Averaging
• CMB observations in LTB universes: Part I: Matching peak positions in the CMB spectrum
• Exact spherically-symmetric inhomogeneous model with n perfect fluids
• Evidence for an environment-dependent shift in the baryon acoustic oscillation peak
• CMB observations in LTB universes: Part II: the kSZ effect in an LTB universe
• Supernovae data and perturbative deviation from homogeneity
• Corrections to the apparent value of the cosmological constant due to local inhomogeneities
• The isotropic blackbody CMB as evidence for a homogeneous universe
• The Mass of the Cosmos
• Redshift drift in axially symmetric quasi-spherical Szekeres models
• Determining the metric of the Cosmos: stability, accuracy, and consistency
• Luminosity distance-redshift relation for the LTB solution near the center
• Euclid: Forecast constraints on consistency tests of the $\Lambda$CDM model
• Analytical Estimate of the Effect of Spherical Inhomogeneities on Luminosity Distance and Redshift
• SNe observations in a meatball universe with a local void
• Cosmic age test in inhomogeneous cosmological models mimicking $\Lambda$CDM on the light cone
• The Metric of the Cosmos from Luminosity and Age Data
• Mimicking the cosmological constant for more than one observable with large scale inhomogeneities
• The Lemaitre Model and the Generalisation of the Cosmic Mass
• Solving the Observer Metric
• Evolution of density perturbations in large void universe
• The Lindquist-Wheeler formulation of lattice universes
• Exact isotropic cosmologies with local fractal number counts
• Regge calculus models of closed lattice universes
• A Note on the Inverse Problem with LTB Universes
• Large-scale peculiar motions and cosmic acceleration
• CMB seen through random Swiss Cheese
• Multicolour Observations, Inhomogeneity & Evolution
• What's Inside the Cone? Numerically reconstructing the metric from observations
• Calculating Observables in Inhomogeneous Cosmologies I: General Framework
• New variables for the Lema\^ıtre-Tolman-Bondi dust solutions
• Discriminating different models of luminosity-redshift distribution
• Observational cosmology using characteristic numerical relativity
• Observational cosmology using characteristic numerical relativity: Characteristic formalism on null geodesics
• $H_0$ tension or $M$ overestimation?
• Dark matter and dark energy proposals: maintaining cosmology as a true science?
• Accelerating Universe from an Evolving Lambda in Higher Dimension
• Inhomogeneous cosmologies with Q-matter and varying $\Lambda$
• Physical geometry of the quasispherical Szekeres models
• Relativistic cosmology number densities in void-Lemaitre-Tolman-Bondi models
• Obtaining the Time Evolution for Spherically Symmetric Lemaître-Tolman-Bondi Models Given Data on Our Past Light Cone
• Presence of anisotropic pressures in Lemaître-Tolman-Bondi cosmological models
• Averaged Lemaître-Tolman-Bondi dynamics
• Testing LTB Void Models Without the Cosmic Microwave Background or Large Scale Structure: New Constraints from Galaxy Ages
• Relaxation versus collision times in the cosmological radiative era
• Simple inhomogeneous cosmological (toy) models
• Finding a Spherically Symmetric Cosmology from Observations in Observational Coordinates -- Advantages and Challenges
• Apparent versus true value of the cosmological constant
• Cosmological model dependence of the galaxy luminosity function: far-infrared results in the Lemaitre-Tolman-Bondi model
• Inverse Construction of the $\Lambda$LTB Model from a Distance-redshift Relation
• Spectral Distortion in a Radially Inhomogeneous Cosmology
• Distinguishing between inhomogeneous model and $\Lambda \text{CDM}$ model with the cosmic age method
• Two-point correlation function of density perturbations in a large void universe
• Thermodynamic perfect fluid spheres admitting an orthogonal flat synchronization
• Emergence of smooth distance and apparent magnitude in a lumpy Universe
• Reconstructing the metric of the local Universe from number counts observations
• Newtonian self-gravitating system in a relativistic huge void universe model
• Inhomegeneous cosmological models and fine-tuning of the initial state
• Constraining LTB models with JLA supernovae and BAO
• Late time solutions for inhomogeneous Lambda-CDM cosmology, their characterization and observation
• Dark Energy Simulations
• An effective $\mathbf{\Lambda }$-Szekeres modelling of the local Universe with Cosmicflows-4
• The averaging problem on the past null cone in inhomogeneous dust cosmologies
• Galaxy Mergers in a Fractal Cosmology