A Covariant Road to Spatial Averaging in Cosmology : Scalar Corrections to the Cosmological Equations

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dc.creatorParanjape, Aseem
dc.date2007-05-16
dc.date.accessioned2026-07-07T11:41:08Z
dc.date.available2026-07-07T11:41:08Z
dc.descriptionA consistent approach to Cosmology requires an explicit averaging of the Einstein equations, to describe a homogeneous and isotropic geometry. Such an averaging will in general modify the Einstein equations. The averaging procedure due to Buchert has attracted considerable attention recently since it offers the tantalizing hope of explaining the phenomenon of dark energy through such corrections. This approach has been criticized, however, on the grounds that its effects may be gauge artifacts. We apply the fully covariant formalism of Zalaletdinov's Macroscopic Gravity and show that, after making some essential gauge choices, the Cosmological equations receive \emph{spacetime scalar} corrections which are therefore observable in principle, and further, that the broad structure of these corrections is \emph{identical} to those derived by Buchert.
dc.description8 pages; This essay received an Honourable Mention in the Gravity Research Foundation's Essay Competition, 2007
dc.identifierhttps://arxiv.org/abs/0705.2380
dc.identifierhttp://arxiv.org/abs/0705.2380
dc.identifierInt.J.Mod.Phys.D17:597-601,2008
dc.identifierdoi:10.1142/S0218271808012322
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200431
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleA Covariant Road to Spatial Averaging in Cosmology : Scalar Corrections to the Cosmological Equations
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