Cosmological consequences of a possible $Λ$-dark matter interaction

We propose a general class of interacting models in which the interaction between the CDM component and $Λ$ is parameterized by an arbitrary function of the cosmic scale factor $ε(a)$. Differently from other dynamical $Λ$ scenarios in which the final stage of cosmic expansion is a de Sitter phase, we find solutions of transient acceleration, in which the $Λ$-dark matter interaction will drive the Universe to a new dark matter-dominated era in the future. We investigate some cosmological consequences of this model and discuss some constraints on its parameters from current SNe Ia, BAO, CMB and $H_0$ data.

No reviews yet.

No comments yet.