Impact of Kuchowicz metric function on gravastars in f(R, T) theory
Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan
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Accepted: 19 November 2020
Published online: 22 November 2020
This paper discusses the configuration of gravitational vacuum star or gravastar with the impact of geometry and matter coupling present in f(R, T) gravity. The gravastar is also conceptualized as a substitute for a black hole which is illustrated by three geometries known as (1) the interior geometry, (2) the intermediate thin-shell and (3) the exterior geometry. For a particular f(R, T) model, we analyze these geometries corresponding to Kuchowicz metric function. We evaluate another metric potential for the interior domain as well as the intermediate shell which is non-singular for both domains. The Schwarzschild metric is adopted to demonstrate the exterior geometry of gravastar, while the numerical values of unknown constants are calculated through boundary conditions. Finally, we discuss different features of gravastar regions like proper length, energy, surface redshift as well as equation of state parameter. We conclude that the gravastar model can be regarded as a successful replacement of the black hole in the context of this gravity.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020