A Long-lived Accretion Disk around a Lithium-depleted Binary T Tauri Star

  title={A Long-lived Accretion Disk around a Lithium-depleted Binary T Tauri Star},
  author={Russel J. White and L. A. Hillenbrand},
  journal={The Astrophysical Journal Letters},
  pages={L65 - L68}
We present a high-dispersion optical spectrum of St 34 and identify the system as a spectroscopic binary with components of similar luminosity and temperature (both M3 ± 0.5). Based on kinematics, signatures of accretion, and location on an H-R diagram, we conclude that St 34 is a classical T Tauri star belonging to the Taurus-Auriga T association. Surprisingly, however, neither component of the binary shows Li I λ6708 absorption, the most universally accepted criterion for establishing stellar… 

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