Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
arXiv:0807.0401 · doi:10.1103/PhysRevD.78.103002
Abstract
It has been argued that the spacetime of our universe can be accurately described by a perturbed conformal Newtonian metric, and hence even large density inhomogeneities in a dust universe can not change the observables predicted by the homogeneous dust model. In this paper we study a spherically symmetric dust model and illustrate conditions under which large spatial variations in the expansion rate can invalidate the argument.
arXiv comment22 pages, 8 figures; replaced to fit the version accepted for publication in Phys. Rev. D
References in corpus (30)
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
- Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
- Dark Energy from structure: a status report
- An inhomogeneous alternative to dark energy?
- On cosmic acceleration without dark energy
- Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology
- Can the Acceleration of Our Universe Be Explained by the Effects of Inhomogeneities?
- Do we really see a cosmological constant in the supernovae data ?
- The universe seen at different scales
- On cosmological observables in a swiss-cheese universe
- Large Scale Inhomogeneity Versus Source Evolution -- Can We Distinguish Them Observationally?
- Accelerated expansion from structure formation
- The effect of inhomogeneous expansion on the supernova observations
- 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
- "Swiss-Cheese" Inhomogeneous Cosmology & the Dark Energy Problem
- Light-cone averages in a swiss-cheese universe
- Nonlinear Structure Formation and "Apparent" Acceleration: an Investigation
- The supernova Hubble diagram for off-center observers in a spherically symmetric inhomogeneous universe
- Mapping Luminosity-Redshift Relationship to LTB Cosmology
- Light Propagation and Large-Scale Inhomogeneities
- Cosmological Acceleration and Gravitational Collapse
- Gravitational Backreaction of Matter Inhomogeneities
- LTB solutions in Newtonian gauge: from strong to weak fields
- Explicit Cosmological Coarse Graining via Spatial Averaging
- Late time failure of Friedmann equation
- General relativistic analysis of peculiar velocities
- Analytical Estimate of the Effect of Spherical Inhomogeneities on Luminosity Distance and Redshift
- Structure Formation, Backreaction and Weak Gravitational Fields
Cited by in corpus (34)
- Cosmological Non-Linearities as an Effective Fluid
- A new framework for analyzing the effects of small scale inhomogeneities in cosmology
- Testing backreaction effects with observations
- Observational constraints on inhomogeneous cosmological models without dark energy
- Multiscale cosmology and structure-emerging Dark Energy: A plausibility analysis
- Cosmological background solutions and cosmological backreactions
- Toward physical cosmology: focus on inhomogeneous geometry and its non-perturbative effects
- Lagrangian theory of structure formation in relativistic cosmology II: average properties of a generic evolution model
- A new stochastic approach to cumulative weak lensing
- Applicability of the linearly perturbed FRW metric and Newtonian cosmology
- Swiss Cheese and a Cheesy CMB
- Observational constraints on the LLTB model
- Back-reaction and effective acceleration in generic LTB dust models
- Apparent and average acceleration of the Universe
- Dark energy as a mirage
- Local and non-local measures of acceleration in cosmology
- Exact spherically-symmetric inhomogeneous model with n perfect fluids
- Geometrical order-of-magnitude estimates for spatial curvature in realistic models of the Universe
- Position and frequency shifts induced by massive modes of the gravitational wave background in alternative gravity
- Averaging Robertson-Walker Cosmologies
- Supernovae data and perturbative deviation from homogeneity
- Accretion, Primordial Black Holes and Standard Cosmology
- SNe observations in a meatball universe with a local void
- Effect of accretion on primordial black holes in Brans-Dicke theory
- Chaplygin gas and effective description of inhomogeneous universe models in general relativity
- The Averaging Problem in Cosmology
- Evidence for the Fifth Element Astrophysical status of Dark Energy
- Future deceleration due to cosmic backreaction in presence of the event horizon
- Dynamic Field Theory and Equations of Motion in Cosmology
- Relativistic cosmological perturbation scheme on a general background: scalar perturbations for irrotational dust
- Effect of cosmic backreaction on the future evolution of an accelerating universe
- Rees--Sciama Effect and Impact of Foreground Structures on Galaxy Redshifts
- Cosmic Acceleration from Causal Backreaction in a Smoothly Inhomogeneous Universe
- Towards physical cosmology: geometrical interpretation of Dark Energy, Dark Matter and Inflation without fundamental sources