  We revisit holographic mesons in the D4/D6 model to study holographic light
vector mesons and the properties of heavy quarkonium in confining and
deconfining phases. To treat the light mesons and heavy quarkonium on the same
footing, we use the same compactification scale MKK in both systems. We observe
that like scalar and pseudo-scalar mesons the vector meson mass is linearly
proportional to the square root of the quark mass, when the quark mass is
large. With a MKK fixed by light meson masses, we calculate the mass of heavy
quarkonium in confining and deconfining phases. We also obtain the inmedium
dispersion relation for heavy quarkonium, which is important to understand the
dissociation and the screening mass of heavy quarkonium in quark-gluon plasma.
