Scale dependence of cosmological backreaction
arXiv:0710.5073 · doi:10.1103/PhysRevD.78.083531
Abstract
Due to the non-commutation of spatial averaging and temporal evolution, inhomogeneities and anisotropies (cosmic structures) influence the evolution of the averaged Universe via the cosmological backreaction mechanism. We study the backreaction effect as a function of averaging scale in a perturbative approach up to higher orders. We calculate the hierarchy of the critical scales, at which 10% effects show up from averaging at different orders. The dominant contribution comes from the averaged spatial curvature, observable up to scales of 200 Mpc. The cosmic variance of the local Hubble rate is 10% (5%) for spherical regions of radius 40 (60) Mpc. We compare our result to the one from Newtonian cosmology and Hubble Space Telescope Key Project data.
6 pages, 2 figures; v3: substantial modifications, new figures
References in corpus (8)
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
- Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
- Dynamical Dark Energy or Simply Cosmic Curvature?
- On the onset of cosmological backreaction
- Anisotropy in the Hubble constant as observed in the HST Extragalactic Distance Scale Key Project results
- Cosmological Backreaction from Perturbations
- The Spatial Averaging Limit of Covariant Macroscopic Gravity - Scalar Corrections to the Cosmological Equations