Lensing effects in inhomogeneous cosmological models

Abstract

Concepts 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.

8 pages, 8 figures

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Cited by in corpus (7)

• Cosmological background solutions and cosmological backreactions
• Studying the precision of ray tracing techniques with Szekeres models
• The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology
• The Local Value of $H_0$ in an Inhomogeneous Universe
• Generalized Swiss-cheese cosmologies: Mass scales
• Light-cone observations and cosmological models: implications for inhomogeneous models mimicking dark energy
• CMB seen through random Swiss Cheese