  We present the first measurement of the nuclear modification factor $R_{AA}$
and elliptic flow $v_{2}$ of $D_{s}$ in Au+Au collisions at $\sqrt{s_{NN}}$ =
200 GeV with the STAR detector. These results have been compared with those of
other open charm mesons and strange mesons to determine how the (possibly)
strangeness equilibrated partonic matter affects the $D_{s}$ meson production.
We find that the nuclear modification factor of $D_{S}$ are systematically
higher than unity and $D^{0}$ $R_{\rm{AA}}$. The ratio $D_{s}/D^{0}$ is shown
as a function of transverse momentum for the 10-40$\%$ most central Au+Au
collisions and compared with that in $p+p$ collisions obtained from PYTHIA. It
is also compared with that in Pb-Pb collisions at 2.76 TeV by the ALICE
experiment. Our measurement indicates a hint of enhancement of $D_{S}$
production in Au+Au collisions with respect to $p+p$ collisions as compared to
non-strange $D$ mesons.
