FRW universe in f(R, T) gravity

Tiwari R., Sofuoğlu D., Beesham A.

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS, cilt.18, sa.7, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 7
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1142/s0219887821501048
  • Dergi Adı: INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Metadex, zbMATH, Civil Engineering Abstracts
  • Anahtar Kelimeler: Varying deceleration parameter, f(R, T) theory, FRW model, redshift, BARYON ACOUSTIC-OSCILLATIONS, I COSMOLOGICAL MODEL, F R, DARK ENERGY, LAMBDA, SUPERNOVAE, PARAMETER, CONSTANT, DISTANCE, OMEGA
  • İstanbul Üniversitesi Adresli: Evet

Özet

In this study, Friedmann-Robertson-Walker space-time filled with a perfect fluid in f(R,T) modified theory, where R is the Ricci scalar and T is the trace of the energy-momentum tensor of matter, has been considered. The investigation of the phase transition of the universe from the decelerating expansion phase to the accelerating one has been made by adopting a special form of the varying deceleration parameter that is inversely proportional to the Hubble parameter. The exact solution of the field equations has been derived. The kinematic and dynamical quantities of the model have been obtained and their evolutions have been discussed by means of their graphs. The statefinder diagnostic has been used and the age of the universe has been computed for testing the validity of the model. It has been shown that the dominant energy of the model is ordinary matter which behaves as the SCDM model at the beginning and it is a quintessence like fluid which behaves as the Lambda CDM model at late times.