Time-dependent interacting dark energy and transient acceleration

Details Time-dependent interacting dark energy and transient acceleration Time-dependent interacting dark energy and transient acceleration

2011-11-29

arxiv.org/abs/1111.6743v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 8 figures

Scientific paper

We investigate cosmological scenarios in which dark matter and dark energy interact with a time-dependent phenomenological form. Starting from simple and extending to more complicated ansatzes, we obtain analytical expressions for the evolutions of the deceleration and the various density parameters. We find that depending on the choices of the model parameters, in the far future the universe can either result to a dark-energy domination, in which the late-time acceleration is permanent, or to a dark-matter domination after passing through a transient accelerating phase.

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