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Study of anisotropic compact stars with Krori–Barua spacetime in f(ℛ,2) gravity.

Authors :
Sharif, M.
Akram, H. M. Salman
Source :
Modern Physics Letters A. 6/14/2022, Vol. 37 Issue 18, p1-18. 18p.
Publication Year :
2022

Abstract

The main objective of this paper is to examine the physical features and stability of anisotropic compact stellar objects in energy–momentum squared gravity. For this purpose, we apply Krori–Barua metric solutions and consider three different models of this modified theory to examine the physical characteristics of Her X-1, 4U 1538-52 and SAX J1808.4-3658 compact stars. We analyze the behavior of various physical quantities such as energy density, pressure components, energy conditions, equation of state parameter and anisotropic factor in the interior of these stars. We then use the estimated values of the sound speed and of the adiabatic index to explore the stability of these compact stars. It is found that all the required conditions are satisfied corresponding to all the selected models. We are therefore allowed to conclude that this modified theory provides viable and stable anisotropic compact stars. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02177323
Volume :
37
Issue :
18
Database :
Academic Search Index
Journal :
Modern Physics Letters A
Publication Type :
Academic Journal
Accession number :
158427932
Full Text :
https://doi.org/10.1142/S0217732322501152