FLRW UNIVERSE IN f(R,Lm) GRAVITY WITH EQUATION OF STATE PARAMETER

Shukla B. K., Tiwari R., Sofuoğlu D., Beesham A.

East European Journal of Physics, cilt.4, ss.376-389, 2023 (ESCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.26565/2312-4334-2023-4-48
  • Dergi Adı: East European Journal of Physics
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI)
  • Sayfa Sayıları: ss.376-389
  • İstanbul Üniversitesi Adresli: Evet

Özet

Available observational data regarding current cosmological characteristics suggest that the universe is, to a large extent, both isotropic and homogeneous on a large scale. In this study, our objective is to analyze the Friedmann-LemaitreRobertson-Walker (FLRW) space time using an perfect fluid distribution. We specifically investigate the framework of f (R, Lm) gravity within certain constraints. To accomplish this, we concentrate on a specific nonlinear f (R, Lm) model, represented by f (R, Lm) = R2 + L alpha m. The field equations are solved using the equation of state parameter of the form of the Chevallier-Polarski-Linder (CPL) parameterization. The deceleration parameter study finds an accelerating universe at late times. The transition redshift is found to be ztr = 0.89 +/- 0.25. Also we discuss the physical and geometrical properties of the model.