Centrality and Transverse Momentum Dependence of HBT Radii in Au+Au Collisions

The expansion dynamics of relativistic heavy ion collisions is influenced by the transport properties of the created medium, as well as the path of the reaction trajectory in the ($T, \mu_B$)-plane. Such an influence can manifest as quantifiable changes in the magnitude of the space-time extent of the emission source, characterized by the so-called HBT radii $R_{out}$, $R_{side}$ and $R_{long}$. We will present and discuss recent HBT measurements which extend the upper momentum range of measurements that have been made in the STAR detector for Au+Au collisions at several collision centralities and beam energies.