Inhomogeneous decelerating models generate effective accelerating FLRW universes at large scales through backreaction that mimics a running dark-energy term.
Light propagation in statistically homogeneous and isotropic dust universes
3 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
We derive the redshift and the angular diameter distance in rotationless dust universes which are statistically homogeneous and isotropic, but have otherwise arbitrary geometry. The calculation from first principles shows that the Dyer-Roeder approximation does not correctly describe the effect of clumping. Instead, the redshift and the distance are determined by the average expansion rate, the matter density today and the null geodesic shear. In particular, the position of the CMB peaks is consistent with significant spatial curvature provided the expansion history is sufficiently close to the spatially flat LambdaCDM model.
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years
2026 3representative citing papers
First model-light constraints on Ω_R + 3Ω_Q from Pantheon+ and BAO reconstructions are consistent with flat FLRW yet too broad to exclude percent-level backreaction.
A new null test is proposed to isolate cosmologies with non-FLRW observational relations by characterizing how they violate curvature-consistency tests of the standard FLRW framework.
citing papers explorer
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A class of decelerating inhomogeneous cosmological models giving rise to accelerating FLRW universes at large scales
Inhomogeneous decelerating models generate effective accelerating FLRW universes at large scales through backreaction that mimics a running dark-energy term.
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A First Observational Assessment of Cosmic Backreaction Over an Extended Redshift Range
First model-light constraints on Ω_R + 3Ω_Q from Pantheon+ and BAO reconstructions are consistent with flat FLRW yet too broad to exclude percent-level backreaction.
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Observational Tests for Distinguishing Classes of Cosmological Models
A new null test is proposed to isolate cosmologies with non-FLRW observational relations by characterizing how they violate curvature-consistency tests of the standard FLRW framework.