Analysis of cosmic aspects through string-inspired teleparallel gravity models (original) (raw)

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Published 10 November 2022 • © 2022 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Physica Scripta,Volume 97,Number 12Citation Abdul Jawad et al 2022 Phys. Scr. 97 125009DOI 10.1088/1402-4896/ac9a8e

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Dates

  1. Received 20 January 2022
  2. Revised 13 October 2022
  3. Accepted 14 October 2022
  4. Published 10 November 2022

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1402-4896/97/12/125009

Abstract

We consider a generic string inspired gravitational theory in the framework of teleparallel gravity whose stringy action based on a particular function which depends on the scalar field, its kinetic energy, the boundary and torsion terms as well as the Gauss-Bonnet terms We examine some cosmographic parameters like the equation of state parameter (ω_tot), plane behavior and their stability with the help of squared speed of sound parameter (v2_s). Under the choice of some specific values of model parameters, the equation of state parameter _ω_tot indicates the range of cosmological constant and quintessence region of the evolving universe for the past, present and near future times while phantom phase in the far future times. The phase plane expresses the super accelerated phase (the freezing region) whereas gives the stability of each underlying model in the realm of accelerated universe.

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