Rotating and expanding Bianchi type-IX model in f (R, T) theory of gravity


Sofuoglu D.

ASTROPHYSICS AND SPACE SCIENCE, vol.361, no.1, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 361 Issue: 1
  • Publication Date: 2016
  • Doi Number: 10.1007/s10509-015-2593-z
  • Journal Name: ASTROPHYSICS AND SPACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: f (R, T) gravity, Bianchi type-IX model, Shear-free perfect fluid, Rotation, FREE PERFECT FLUIDS, PROBE WMAP OBSERVATIONS, GALAXY REDSHIFT SURVEY, SHEAR-FREE, DARK ENERGY, COSMOLOGICAL MODELS, GENERAL-RELATIVITY, F(R,T) GRAVITY, EQUATION, RECONSTRUCTION
  • Istanbul University Affiliated: Yes

Abstract

The spatially homogeneous shear-free, rotating and expanding Bianchi type-IX universe has been considered in the presence of perfect fluid in f (R, T) theory of gravity. The exact solution of the field equations has been obtained and the functional form of f (R, T) = R + 2f (T) gravity has been reconstructed. The existence of such a solution suggests that the general relativistic shear-free perfect fluid conjecture which claims that a shear-free perfect fluid cannot rotate and expand at the same time, is not valid in this modified theory.