Observational constraints on modified CPL models considering non-cold dark matter

Abstract

In the present work we consider three modified Chevallier–Polarski–Linder (CPL) models with considering non-cold dark matter in the background of homogeneous and isotropic FLRW space–time model. From the observational data set ((Pantheon+)+BAO+HST) we find that all the parameters involved in the models having equation of dark energy state ωde=ω0+ω1a(1+a)p (Model II) and ωde=ω0+ω11‑a(1+a)p (Model III) do not depend on p. We also find that for all the models equation of state for dark matter is almost same and observe that Model I is more preferable than the other two proposed models.