Affiliation:
1. Department of Mathematics, Ambo University, Ethiopia
2. Department of Applied Mathematics, Andhra University, India
Abstract
In this paper, we analyze anisotropic and homogeneous Bianchi type V spacetime in the presence of dark matter and holographic dark energy model components in the framework of general relativity and Lyra’s geometry. The solutions of differential equation fields have been obtained by considering two specific cases, namely, the expansion scalar
in the model is proportional to the shear scalar
and the average scale factor taken as hybrid expansion form. The solutions for field equations are obtained in general relativity and Lyra’s geometry. The energy density of dark matter in both natures was obtained and compared so that the energy density of dark matter in general relativity is slightly different from the energy density of dark matter in Lyra’s geometry. A similar behavior occurred in case of pressure and EoS parameter of holographic dark energy model in respective frameworks. Also, it is concluded that the physical parameters such as the average Hubble parameter, spatial volume, anisotropy parameter, expansion scalar, and shear scalar are the same in both frameworks. Moreover, it is observed that the gauge function
is a decreasing function of cosmic time in Lyra’s geometry, and for late times, the gauge function
converges to zero and Lyra’s geometry reduces to general relativity in all respects. Finally, we conclude that our models are a close resemblance to the
CDM cosmological model in late times and consistent with the recent observations of cosmological data.
Subject
Nuclear and High Energy Physics
Cited by
5 articles.
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