Quarkonia measurements at RHIC-STAR

Quarkonia have long been recognized as a unique probe to study the properties of the quark-gluon plasma (QGP) created in high-energy heavy-ion collisions. Specifically, their yields in heavy-ion collisions are expected to be suppressed compared to that in vacuum due to medium-induced dissociation, which is related to QGP's deconfinement and dynamics. Furthermore, different quarkonia of different binding energies are predicted to suffer from different levels of suppression, providing an additional handle on studying the medium properties. In this talk, I will introduce the instruments at RHIC-STAR that enable quarkonium measurements via both dielectron and dimuon channels. Results of quarkonium modification in heavy-ion collisions will be presented, and their physics implications will be discussed.