Impact of three years of data from the Wilkinson Microwave Anisotropy   Probe on cosmological models with dynamical dark energy
  The first three years of observation of the Wilkinson Microwave Anisotropy Probe (WMAP) have provided the most precise data on the anisotropies of the cosmic microwave background (CMB) to date. We investigate the impact of these results and their combination with data from other astrophysical probes on cosmological models with a dynamical dark energy component. By considering a wide range of such models, we find that the constraints on dynamical dark energy are significantly improved compared to the first year data. 
Michael Doran, Georg Robbers, Christof Wetterich