Probing Ricci dark energy model with perturbations by using WMAP
  seven-year cosmic microwave background measurements, BAO and Type Ia
  supernovae
  In this paper, we investigate the Ricci dark energy model with perturbations
through the joint constraints of current cosmological data sets from dynamical
and geometrical perspectives. We use the full cosmic microwave background
information from WMAP seven-year data, the baryon acoustic oscillations from
the Sloan Digital Sky Survey and the Two Degree Galaxy Redshift Survey, and
type Ia supernovae from the Union2 compilation of the Supernova Cosmology
Project Collaboration. A global constraint is performed by employing the Markov
chain Monte Carlo method. With the best-fitting results, we show the
differences of cosmic microwave background power spectra and background
evolutions for the cosmological constant model and Ricci dark energy model with
perturbations.
