On an interacting ghost dark energy model in a non-flat universe with accelerating expansion

Abstract

An interacting ghost dark energy with experimental constraint in a non-flat universe with accelerating expansion is studied in this report. Based on the linear relationship between dark energy and the Hubbard function, it is found that the non-gravitational interaction between dark energy and cold dark matter near a = 0 leads to the transfer of energy from cold dark matter to dark energy. The cosmological evolution of the interacting ghost dark energy density, its equation of state and the deceleration parameters in a non-flat universe are obtained analytically. Based on the astronomical observations on the present value of the energy density of state ω_D0, we impose restrictions on the interaction factor. It is found that there is a simple reverse linear relationship between ω_D0 with the interaction factor, and all the deceleration parameters q₀ ⊂ [−0.91, −0.38] are negative, which aligns with the astronomic observation on the accelerated expansion of the universe.