The Density Profile and Kinematics of the Milky Way with RR Lyrae Stars
  Most of known RR Lyraes are type ab RR Lyraes (RRLab), and they are the
excellent tool to map the Milky Way and its substructures. We find that 1148
RRLab stars determined by Drake et al.(2013) have been observed by
spectroscopic surveys of SDSS and LAMOST. We derived radial velocity
dispersion, circular velocity and mass profile from 860 halo tracers in our
paper I. Here, we present the stellar densities and radial velocity
distributions of thick disk and halo of the Milky Way. The 288 RRLab stars
located in the thick disk have the mean metallicity of [Fe/H]$=-1.02$. Three
thick disk tracers have the radial velocity lower than 215 km $\rm s^{-1}$.
With 860 halo tracers which have a mean metallicity of [Fe/H]$=-1.33$, we find
a double power-law of $n(r) \propto r^{-2.8}$ and $n(r) \propto r^{-4.8}$ with
a break distance of 21 kpc to express the halo stellar density profile. The
radial velocity dispersion at 50 kpc is around 78 km $\rm s^{-1}$.
