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2012

Observational Cosmology in Macroscopic Gravity

Clifton, Timothy, Coley, Alan, Hoogen, Robert van den

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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.

Observational Cosmology in Macroscopic Gravity · Around

Built on

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R. M. Zalaletdinov, Gen. Rel. Grav
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A. Paranjape and T. P. Singh, Phys. Rev. D
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R. J. van den Hoogen, Gen. Rel. Grav
2008
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See special focus section in CQG on inhomogeneous cosmological models and averaging in cosmology, including; L. Andersson and A. A. Coley, Class. Quant. Grav
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