Eur. Phys. J. Plus (2018) 133: 188
https://doi.org/10.1140/epjp/i2018-12034-x

Regular Article

Ellipsoidal expansion of the Universe, cosmic shear, acceleration and jerk parameter

¹ Dipartimento di Fisica dell’Università di Bari, 70126, Bari, Italy
² INFN, Sezione di Bari, I-70126, Bari, Italy

^* e-mail: luigi.tedesco@ba.infn.it

Received: 6 November 2017
Accepted: 25 April 2018
Published online: 17 May 2018

Abstract

In order to study whether the anisotropy of the spacetime may induce differences in the cosmic shear or in the deceleration parameter, we investigate in the Bianchi I Universe the most general expression for the cosmic shear and we study the connections between deceleration parameter and cosmic shear. We also consider a shear parametric approach to measure the transition from a decelerating to an accelerating Universe. We also study the connection between jerk parameter and ellipsoidal Universe.