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Spatially resolved imaging spectroscopy of T Tauri | | M.E. Kasper
; M. Feldt
; T.M. Herbst
; S. Hippler
; T. Ott
; L.E. Tacconi-Garman
; | | Date: |
3 Dec 2001 | | Subject: | astro-ph | | Abstract: | The small separation of the individual stellar components in the TTau system has 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 taken using the ALFA adaptive optics (AO) system in combination with the 3D integral field spectrograph. Except for the Brackett series seen in emission, the NIR spectra of ts{} appear featureless, suggesting that warm dust dominates the radiation. No ro-vibrational lines of molecular hydrogen were found in close vicinity to the stars. The Brackett line emission from tn{} and S could not be resolved with the 3.5-m-telescope, implying that it arises within 6 AU from the stars. The line ratios between Br$gamma$ (2.166 mum{}) and Br10 (1.736 mum{}) toward tn{} and ts{} are similar, suggesting similar selective extinctions towards the respective emitting regions. Our results are consistent with a model that describes ts{} as a pre-main sequence star surrounded by a small edge-on disk, leaving the polar regions relatively unobscured. We present numerical simulations which support this model. | | Source: | arXiv, astro-ph/0112042 | | Services: | Forum | Review | PDF | Favorites | |
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