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Lensing effects in inhomogeneous cosmological models · Around

2009

Lensing effects in inhomogeneous cosmological models

Ghassemi, Sima, Moghaddam, Salomeh Khoeini, Mansouri, Reza

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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.

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