f(R,T) Gravity Model Behaving as a Dark Energy Source
arXiv:2010.13784 · doi:10.1016/j.newast.2020.101542
Abstract
Within the limits of the present cosmological observations in f(R,T) gravity theory, we have analyzed a spherically symmetric space-time in 5D setting. The field equations have been carefully studied considering reasonable cosmological assumptions to obtain exact solutions. We have obtained an isotropic model universe undergoing super-exponential expansion. It is predicted that the model universe behaves like a dark energy (vacuum energy) model. In the present scenario, the model evolves with a slow and uniform change of shape. It is observed that the universe is close to or nearly flat. The model is free from initial singularity and is predicted to approach the de-Sitter phase dominated by vacuum energy or cosmological constant in the finite-time future. A comprehensive discussion on the cosmological parameters obtained in view of the recent studies is presented in detail with graphs.
14 pages, 9 figures
References in corpus (11)
- f(R,T) gravity
- Planck evidence for a closed Universe and a possible crisis for cosmology
- A new kind of cyclic universe
- Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
- Hidden Negative Energies in Strongly Accelerated Universes
- Lectures on quantum energy inequalities
- Classical Geometry of De Sitter Spacetime : An Introductory Review
- From de Sitter to de Sitter: A non-singular inflationary universe driven by vacuum
- From inflation to late time acceleration with a decaying vacuum coupled to radiation or matter
- Revisiting the Cosmological Constant Problem within Quantum Cosmology
- A Physical Source of Dark Energy and Dark Matter