Conformal vector fields over Lyra manifold of locally rotationally symmetric Bianchi type I spacetimes
Department of Basic Sciences and Islamiat, University of Engineering and Technology Peshawar, Peshawar, Pakistan
2 Department of Mathematics, University of Peshawar, Peshawar, Khyber Pukhtoonkhwa, Pakistan
Accepted: 8 June 2020
Published online: 16 June 2020
In this paper the conformal vector fields (CVFs) of locally rotationally symmetric (LRS) Bianchi type-I spacetime in Lyra geometry have been explored. The obtained CVFs are admitted by some special classes of the metrics of LRS Bianchi type-I spactime. The obtained metrics are then utilized into Einstein field equations (EFEs) of Lyra geometry to find the displacement vector (DV), density and pressure in the case of a perfect fluid matter. Some physical quantities like expansion scalar, Hubble parameter, shear scalar, average anisotropy parameter, deceleration parameter and the relative anisotropy of the obtained metrics are also discussed. It has been observed that conformal symmetry plays a vital role at the era of evolution of cosmos.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020