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Accelerating universe in modified teleparallel gravity theory

Published online by Cambridge University Press:  29 January 2021

Shambel Sahlu ,
Joseph Ntahompagaze ,
Amare Abebe  and
David F. Mota
Shambel Sahlu
Affiliation:
Astronomy and Astrophysics Research and Development Division, Entoto Observatory and Research Center, Ethiopian Space Science and Technology Institute, Addis Ababa, Ethiopia. Department of Physics, College of Natural Science, Wolkite University, Wolkite, Ethiopia.
Joseph Ntahompagaze
Affiliation:
Department of Physics, College of Science and Technology, University of Rwanda, Kigali, Rwanda.
Amare Abebe
Affiliation:
Center for Space Research, North-West University, Mafikeng, South Africa.
David F. Mota
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway
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Abstract

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This paper studies the cosmology of accelerating expansion of the universe in modified teleparallel gravity theory. We discuss the cosmology of f(T, B) gravity theory and its implication to the new general form of the equation of state parameter wTB for explaining the late-time accelerating expansion of the universe without the need for the cosmological constant scenario. We examine the numerical value of wTB in different paradigmatic f(T, B) gravity models. In those models, the numerical result of wTB is favored with observations in the presence of the torsion scalar T associated with a boundary term B and shows the accelerating expansion of the universe.

Keywords

f(T, B) gravity theoryaccelerating universeequation of state parameter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 397 - 399
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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