Decaying Vacuum Cosmology and its Scalar Field Description

Details Decaying Vacuum Cosmology and its Scalar Field Description Decaying Vacuum Cosmology and its Scalar Field Description

2012-04-09

arxiv.org/abs/1204.1864v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures

Scientific paper

We discuss the cosmological consequences of an interacting model in the dark sector in which the $\Lambda$ component evolves as a truncated power series of the Hubble parameter. In order to constrain the free parameters of the model we carry out a joint statistical analysis involving observational data from current type Ia supernovae, recent estimates of the cosmic microwave background shift parameter and baryon acoustic oscillations measurements. Finally, we adopt a theoretical method to derive the coupled scalar field version for this non-equilibrium decaying vacuum accelerating cosmology.

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