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Influence of modification of gravity on the dynamics of radiating spherical fluids

Z. Yousaf1,*, Kazuharu Bamba2,†, and M. Zaeem ul Haq Bhatti1,‡

  • 1Department of Mathematics, University of the Punjab, Quaid-i-Azam Campus, Lahore 54590, Pakistan
  • 2Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan

  • *zeeshan.math@pu.edu.pk
  • †bamba@sss.fukushima-u.ac.jp
  • ‡mzaeem.math@pu.edu.pk
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Phys. Rev. D 93, 064059 – Published 24 March, 2016

DOI: https://doi.org/10.1103/PhysRevD.93.064059

Abstract

We explore the evolutionary behaviors of compact objects in a modified gravitational theory with the help of structure scalars. Particularly, we consider the spherical geometry coupled with heat- and radiation-emitting shearing viscous matter configurations. We construct structure scalars by splitting the Riemann tensor orthogonally in f(R,T) gravity with and without constant R and T constraints, where R is the Ricci scalar and T is the trace of the energy-momentum tensor. We investigate the influence of the modification of gravity on the physical meaning of scalar functions for radiating spherical matter configurations. It is explicitly demonstrated that even in modified gravity, the evolutionary phases of relativistic stellar systems can be analyzed through the set of modified scalar functions.

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Phys. Rev. D 93, 064059– Published 24 March, 2016
  • Received 29 November 2015

© 2016 American Physical Society

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