Spatially Resolved Imaging Spectroscopy of T Tauri

The small separation of the individual stellar components in the TTau systemhas prevented spectroscopy of the individual components in the near-infrared(NIR) in the past. We present NIR data (H- and K-band) on this object takenusing the ALFA adaptive optics (AO) system in combination with the 3D integralfield spectrograph. Except for the Brackett series seen in emission, the NIRspectra of \tts{} appear featureless, suggesting that warm dust dominates theradiation. No ro-vibrational lines of molecular hydrogen were found in closevicinity to the stars. The Brackett line emission from \ttn{} and S could notbe resolved with the 3.5-m-telescope, implying that it arises within 6 AU fromthe stars. The line ratios between Br$\gamma$ (2.166 \mum{}) and Br10 (1.736\mum{}) toward \ttn{} and \tts{} are similar, suggesting similar selectiveextinctions towards the respective emitting regions. Our results are consistentwith a model that describes \tts{} as a pre-main sequence star surrounded by asmall edge-on disk, leaving the polar regions relatively unobscured. We presentnumerical simulations which support this model.Comment: 8 pages, 3 figures, ApJ (March 2002, accepted