Super-acceleration on the brane through energy flow from the bulk
Open Access
- 1 March 2006
- journal article
- Published by IOP Publishing in Journal of Cosmology and Astroparticle Physics
- Vol. 2006 (3) , 006
- https://doi.org/10.1088/1475-7516/2006/03/006
Abstract
We consider a brane cosmological model with energy exchange between the brane and the bulk. Parametrizing the energy exchange term using the scale factor and Hubble parameter, we are able to exactly solve the modified Friedmann equation on the brane. In this model, the equation of state for the effective dark energy has a transition behaviour, changing from wdeeff > −1 to wdeeff < −1, while the equation of state for the dark energy on the brane has w >−1. Fitting data from type Ia supernovae, the Sloan Digital Sky Survey and the Wilkinson Microwave Anisotropy Probe, our universe is predicted now to be in a state of super-acceleration with wde0eff = −1.21.Keywords
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