LRS Bianchi type IV space-time with anisotropic fluid


Sofuoglu D.

CHINESE JOURNAL OF PHYSICS, cilt.57, ss.226-239, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 57
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.cjph.2018.12.002
  • Dergi Adı: CHINESE JOURNAL OF PHYSICS
  • Sayfa Sayıları: ss.226-239

Özet

In this study, locally rotationally symmetric Bianchi type IV universe is considered in Einstein's general theory of relativity in the presence of a cosmic fluid with anisotropic pressure but without heat flux. For this shear-free model, assuming linear barotropic equation of state, the exact solution of the field equation is obtained for the values of equation of state parameter -2/3 and -1/3. It has been shown that the model, which mimics dark energy, has an accelerating expansion anisotropy at the early time and approaches isotropy as the cosmic time increases.