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On light propagation in Swiss-Cheese cosmologies

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arxiv 1012.5239 v2 pith:EUX4FE6K submitted 2010-12-23 astro-ph.CO gr-qc

Sebastian J. Szybka This is my paper · ORCID
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keywords inhomogeneitieslighteffectmodelspropagationswiss-cheeseacceleratedaverage
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We study the effect of inhomogeneities on light propagation. The Sachs equations are solved numerically in the Swiss-Cheese models with inhomogeneities modelled by the Lemaitre-Tolman solutions. Our results imply that, within the models we study, inhomogeneities may partially mimic the accelerated expansion of the Universe provided the light propagates through regions with lower than the average density. The effect of inhomogeneities is small and full randomization of the photons' trajectories reduces it to an insignificant level.

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  1. Physical geometry of the quasispherical Szekeres models

    gr-qc 2019-08 conditional novelty 6.0 of 10

    The dipole functions in quasispherical Szekeres models shift shells relative to each other and rotate their local frames by exact amounts, and the paper shows how these effects explain the models' geometry.

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