Interacting holographic tachyon model of dark energy

We propose a holographic tachyon model of dark energy with interaction between the components of the dark sector. The correspondence between the tachyon field and the holographic dark energy densities allows the reconstruction of the potential and the dynamics of the tachyon scalar field in a flat FriedmannRobertsonWalker universe. We show that this model can describe the observed accelerated expansion of our universe with a parameter space given by the most recent observational results. © 2010 World Scientific Publishing Company.This work was supported by DGICYT under Research Project No. FIS2005-01180, by the Spanish MICINN Project FIS2008-06078-C03-03.Peer Reviewe