Lensing effects in inhomogeneous cosmological models

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dc.creatorGhassemi, Sima
dc.creatorMoghaddam, Salomeh Khoeini
dc.creatorMansouri, Reza
dc.date2009-01-03
dc.date.accessioned2026-07-07T13:12:47Z
dc.date.available2026-07-07T13:12:47Z
dc.descriptionConcepts developed in the gravitational lensing techniques such as shear, convergence, tangential and radial arcs maybe used to see how tenable inhomogeneous models proposed to explain the acceleration of the universe models are. We study the widely discussed LTB cosmological models. It turns out that for the observer sitting at origin of a global LTB solution the shear vanishes as in the FRW models, while the value of convergence is different which may lead to observable cosmological effects. We also consider Swiss-cheese models proposed recently based on LTB with an observer sitting in the FRW part. It turns out that they have different behavior as far as the formation of radial and tangential arcs are concerned.
dc.description8 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0901.0340
dc.identifierhttp://arxiv.org/abs/0901.0340
dc.identifierPhys.Rev.D79:102002,2009
dc.identifierdoi:10.1103/PhysRevD.79.102002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229683
dc.subjectCosmology and Nongalactic Astrophysics
dc.titleLensing effects in inhomogeneous cosmological models
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