ARE BOTH STARS IN A CLASSIC T-TAURI BINARY CLASSIC T-TAURI STARS

Large near-IR color excesses and emission-line spectra indicate the pr esence of optically thick circumstellar accretion disks and active bou ndary layers in young stars. We investigate whether this classic T Tau ri (TT) behavior is found in one or both members of a binary system pr eviously identified as a TT on the basis of the unresolved light. We c onsider the angularly resolved Br gamma and, in one case, Na I, spectr a of four close (1''.3-2''.6) TT systems. We also take into account th e angularly resolved near-IR (K-L) colors of eight additional young bi naries with separations between 0''.3 and 2''.5. We find that for all 12 systems, both components show, or have shown in the history of thei r observation, evidence for TT behavior. We demonstrate that this cann ot be the result of random pairing of a population of single TT and we ak-lined T Tauri (WT) stars. We speculate that the result that inner, AU-sized disks tend to survive for a similar length of time in both co mponents of a close (0''.3-2''.6) binary suggests that a circumbinary envelope effectively regulates the common evolution of the inner disks .