On the physical effects of consistent cosmological averaging
arXiv:1308.5072 · doi:10.1103/PhysRevD.88.083523
Abstract
We use cosmological perturbation theory to study the backreaction effects of a self-consistent and well-defined cosmological averaging on the dynamics and the evolution of the Universe. Working with a perturbed Friedman-Lemaitre-Robertson-Walker Einstein-de Sitter cosmological solution in a comoving volume-preserving gauge, we compute the expressions for the expansion scalar and deceleration parameter to second order, which we use to characterize the backreaction. We find that the fractional shift in the Hubble parameter with respect to the input background cosmological model is Delta~10^{-5}, which leads to an effective energy density of the order of a few times 10^{-5}. In addition, we find that an appropriate measure of the fractional shift in the deceleration parameter Q is very large.
20 pages, 2 figures, RevTeX
References in corpus (28)
- Cosmic clocks, cosmic variance and cosmic averages
- Exact solution to the averaging problem in cosmology
- Accelerated expansion from structure formation
- Second-order Gauge Invariant Cosmological Perturbation Theory: -- Einstein equations in terms of gauge invariant variables --
- Light-cone averages in a swiss-cheese universe
- Scale dependence of cosmological backreaction
- Multiscale cosmology and structure-emerging Dark Energy: A plausibility analysis
- On the onset of cosmological backreaction
- The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models
- Evaluating backreaction with the peak model of structure formation
- On the curvature of the present-day Universe
- Luminosity distance in "Swiss cheese" cosmology with randomized voids: I. Single void size
- The influence of structure formation on the cosmic expansion
- Inflationary Infrared Divergences: Geometry of the Reheating Surface vs. delta N Formalism
- Spatially averaged cosmology in an arbitrary coordinate system
- Cosmological Backreaction from Perturbations
- The Spatial Averaging Limit of Covariant Macroscopic Gravity - Scalar Corrections to the Cosmological Equations
- Cosmic spherical void via coarse-graining and averaging non-spherical structures
- Averaging in Spherically Symmetric Cosmology
- Backreaction during inflation: a physical gauge invariant formulation
- Averaging Robertson-Walker Cosmologies
- Toward a No-Go Theorem for an Accelerating Universe through a Nonlinear Backreaction
- Backreaction of Cosmological Perturbations in Covariant Macroscopic Gravity
- Volume averaging in the quasispherical Szekeres model
- Violation of the FRW consistency condition as a signature of backreaction
- Spherically Symmetric Solutions in Macroscopic Gravity
- Backreaction: Gauge and Frame Dependences
- A Phantom does not Result from a Backreaction
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- Is there proof that backreaction of inhomogeneities is irrelevant in cosmology?
- Cosmological Perturbations in Unimodular Gravity
- On average properties of inhomogeneous fluids in general relativity III: general fluid cosmologies
- Backreaction and continuum limit in a closed universe filled with black holes
- Cosmology on all scales: a two-parameter perturbation expansion
- Expansion and Growth of Structure Observables in a Macroscopic Gravity Averaged Universe