  The in-medium behavior of ground-state $q\bar{q}$ mesons, where $q \in
\{u,d,s,c\}$, in vector and axial-vector channels is studied based on the
spectral analysis for mesonic correlators at finite temperature and zero
chemical potential. We first compute the correlators by solving the quark gap
equations and the inhomogeneous Bethe-Salpeter equations in the rainbow-ladder
approximation. Using a phenomenological ansatz, the spectral functions are
extracted by fitting the correlators. By analyzing the evolution of the
spectral functions with the temperature, we obtain the dissociation
temperatures of mesons and discuss their relations to the critical temperature
of the chiral symmetry restoration. The results show a pattern of the flavor
dependence of the thermal dissociation of the mesons.
