Dark energy from a geometrical gauge scalar-tensor theory of gravity
Abstract
In this paper we obtain some cosmological solutions that describe the present period of accelerating expansion of the Universe in the framework of a geometrical gauge scalar-tensor theory of gravity. The background geometry in the model is the Weyl integrable and we found a class of power law solutions for the Weyl scalar field when an invariant metric is employed in a power law expanding universe. We obtain a deceleration and an equation of state parameters (EoS) in agreement with PLANCK 2018 observational data for some specific parameters of the model. The deceleration parameter tends asymptotically to -1/2 and the phantom divide line can be crossed by the EoS parameter in this model.
- Publication:
-
Physica Scripta
- Pub Date:
- March 2023
- DOI:
- 10.1088/1402-4896/acb868
- arXiv:
- arXiv:2204.08562
- Bibcode:
- 2023PhyS...98c5021M
- Keywords:
-
- Weyl-Integrable geometry;
- accelerating expansion of the universe;
- gauge scalar-tensor gravity;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- E-Print:
- 9 pages, no figures