Decaying Vacuum Cosmology and its Scalar Field Description

2012/04/09 by F. E. M. Costa, Costa, F. E. M., J. A. S. Lima +3
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #astro-ph.CO

paper · pdf · doi:10.48550/arxiv.1204.1864

5 pages, 2 figures

arxiv created 2012/04/09 · arxiv updated 2012/04/10

Abstract

We discuss the cosmological consequences of an interacting model in the dark sector in which the Λ 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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