Observational constraints on teleparallel effective equation of state

• Published in: General relativity and gravitation Vol. 55; no. 8
• Main Authors: Shekh, S. H., Chaudhary, H., Bouali, A., Dixit, A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2023; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Cosmology; Classical and Quantum Gravitation; Deceleration; Differential Geometry; Equations of state; Gravity; Mathematical and Computational Physics; Mathematical models; Parameters; Physics; Physics and Astronomy; Quantum Physics; Relativity Theory; Theoretical; Universe; FRW universe; (; Cosmology; gravity; Effective equation of state
• ISSN: 0001-7701; 1572-9532
• DOI: 10.1007/s10714-023-03140-5

A cluster of astronomical observations emerged that the present Universe is in a phase of accelerated expansion. To examine the accelerated expansion of the Universe, we used the newly proposed gravity in which torsion scalar is responcible for the accelerated expansion. The investigation is carried out using a parameterized effective equation of state with the free parameters α , β , ω 0 and ω 1 . Also, for the analysis we consider the model of the form f ( T ) = m ( - T ) n , where m ≠ 0 and n are the constants. By constraining the model with the combined H ( z ),  SC ,  unCorBAO sample datasets. The model appeared to be in good agreement with the observations, and we were able to determine the parameter values that fit the data the best. Finally, we examined how the deceleration parameter and equation of state parameter behaved in relation to the parameter values that best suited the data.