A study of pilgrim dark energy model in Brans–Dicke theory
Abstract
In this paper, we study the behavior of non-interacting and interacting pilgrim dark energy (DE) for non-flat FRW model in Brans–Dicke (BD) theory. We consider the future event horizon as well as logarithmic form of BD scalar field ψ∝ln(γ+δa), where γ>1, δ>0 and a is the scale factor. We evaluate some well-known cosmological parameters such as equation of state as well as deceleration parameter and ωΛ−ω′Λ plane as well as statefinder parameters. We discuss graphical behavior of these parameters through pilgrim DE parameter μ=−1.2,1,1.2 for both non-interacting as well as interacting case with interacting parameter b2=0.02,0.5,1. It is found that the equation of state parameter gives consistent results with the current cosmic behavior while the deceleration parameter represents transition from decelerated to accelerated phase. The cosmological planes represent different DE regions. Finally, we discuss stability of the model through squared speed of sound in both cases.
