Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy

@article{Edwards2006ProbingTT,
  title={Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy},
  author={Suzan Edwards and William J. Fischer and L. A. Hillenbrand and John Kwan},
  journal={The Astrophysical Journal},
  year={2006},
  volume={646},
  pages={319-341}
}
In a high-dispersion 1 μm survey of 39 classical T Tauri stars (CTTSs) veiling is detected in 80% of the stars, and He I λ10830 and Pγ line emission in 97%. On average, the 1 μm veiling exceeds the level expected from previously identified sources of excess emission, suggesting the presence of an additional contributor to accretion luminosity in the star-disk interface region. Strengths of both lines correlate with veiling, and at Pγ there is a systematic progression in profile morphology with… 
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Time-domain spectroscopy of the classical accreting T Tauri star, TW Hya, covering a decade and spanning the far UV to the near-infrared spectral regions can identify the radiation sources, the
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