The role of potential in the ghost-condensate dark energy model

Abstract

We consider the ghost-condensate model of dark energy with a generic potential term. The inclusion of the potential is shown to give greater freedom in realising the phantom regime. The self-consistency of the analysis is demonstrated using WMAP7+BAO+Hubble data.

A new sub-section added, 13 pages, 3 figures, LaTex. paper thoroughly rewritten. arXiv admin note: substantial text overlap with arXiv:1301.4746; and text overlap with arXiv:1008.2182 by other authors

References in corpus (3)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Observational constraints on phantom power-law cosmology

Cited by in corpus (1)

• Phase structure of the $O(2)$ ghost model with higher-order gradient term