Observational Cosmology in Macroscopic Gravity
arXiv:1209.1085 · doi:10.1088/1475-7516/2012/10/044
Abstract
We discuss the construction of cosmological models within the framework of Macroscopic Gravity (MG), which is a theory that models the effects of averaging the geometry of space-time on large scales. We find new exact spatially homogeneous and isotropic FLRW solutions to the MG field equations, and investigate large-scale perturbations around them. We find that any inhomogeneous perturbations to the averaged geometry are severely restricted, but that possible anisotropies in the correlation tensor can have dramatic consequences for the measurement of distances. These calculations are a first step within the MG approach toward developing averaged cosmological models to a point where they can be used to interpret real cosmological data, and hence to provide a working alternative to the "concordance" LCDM model.
22 pages
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Cited by in corpus (5)
- Backreaction: Gauge and Frame Dependences
- Expansion and Growth of Structure Observables in a Macroscopic Gravity Averaged Universe
- Averaged universe confronted with cosmological observations: A fully covariant approach
- An Almost-FLRW Universe as the Averaged Geometry in Macroscopic Gravity
- Spherical and Plane Symmetric Solutions in Macroscopic Gravity