Constraints on the Holographic Dark Energy Model from Type Ia
  Supernovae, WMAP7, Baryon Acoustic Oscillation and Redshift-Space Distortion
  In this paper, we use the joint measurement of geometry and growth rate from
matter density perturbations to constrain the holographic dark energy model.
The geometry measurement includes type Ia supernovae (SN Ia) Union2.1, full
information of cosmic microwave background (CMB) from WMAP-7yr and baryon
acoustic oscillation (BAO). For the growth rate of matter density
perturbations, the results $f(z)\sigma_8(z)$ measured from the redshift-space
distortion (RSD) in the galaxy power spectrum are employed. Via the Markov
Chain Monte Carlo method, we try to constrain the model parameters space. The
jointed constraint shows that $c=0.750_{- 0.0999- 0.173- 0.226}^{+ 0.0976+
0.215+ 0.319}$ and $\sigma_8=0.763_{- 0.0465- 0.0826- 0.108}^{+ 0.0477+ 0.0910+
0.120}$ with $1,2,3\sigma$ regions. After marginalizing the other irrelevant
model parameters, we show the evolution of the equation of state of HDE with
respect to the redshift $z$. Though the current cosmic data points favor a
phantom like HDE Universe for the mean values of the model parameters in the
future, it can behave like quintessence in $3\sigma$ regions.
