High Spatial Resolution Imaging of Pre-Main-Sequence Binary Stars: Resolving the Relationship between Disks and Close Companions

In order to study the passive and active effects of young close companion stars and to constrain possible multiple star formation mechanisms, we have carried out a high-resolution imaging program of six multiple T Tauri star systems using the HubbleSpaceTelescope from 0.3 to 0.9 ?m and ground-based speckle imaging from 1 to 2 ?m. Each system (GG Tau, UZ Tau, DF Tau, RW Aur, V773 Tau, and V410 Tau) has at least one binary pair with separation between 007 and 04 (10-50 AU). In addition to the previously known companions, a third component is discovered in the V410 Tau system.