  Charm quarks are an excellent probe to study properties of the Quark-Gluon
Plasma (QGP) created in ultra-relativistic heavy-ion collisions. In particular,
measurements of the $D_{s}^{\pm}$ meson production can provide valuable
information on the charm quark hadronization mechanism in the QGP. We report
the measurements from the STAR experiment on the invariant yields of
$D_{s}^{\pm}$ mesons as a function of transverse momentum for different
centrality classes of Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$ = 200 GeV.
These measurements utilize the data with the Heavy Flavor Tracker detector from
2014 and 2016. The ratio between strange ($D_{s}^{\pm}$) and non-strange
($D^{0}$) open charm mesons will also be shown, and compared to PYTHIA and
different model calculations. A clear enhancement relative to the PYTHIA
calculation is seen in the ratio, while different model calculations
incorporating strangeness enhancement and charm quark coalescence hadronization
can describe the observed enhancement qualitatively. These results suggest that
recombination of charm quarks with strange quarks in the QGP plays an important
role in charm quark hadronization.
