[Previous] | [Session 5] | [Next]

[5.03] Forbidden Line Emissions in the T-Tauri Spectroscopic Binaries DQ Tau and UZ Tau-E Monitored over an Orbital Period

M. Huerta, P. Hartigan (Rice University), R.J. White (Cal Tech)

We present high resolution, echelle spectroscopy of the close pre-main-sequence binary star systems DQ Tau and UZ Tau-E. Over a 16 day time interval we acquired 14 nights of spectra for DQ Tau and 12 nights of spectra for UZ Tau-E. This represents the entire phase of DQ Tau, and 63 percent of the phase of UZ Tau-E. As expected, photospheric lines such as Li I \lambda6707 clearly split into two components as the primary and secondary orbit one another, as did the permitted line He I \lambda5876. In both objects, unlike the photospheric features, the forbidden lines of [O~I] \lambda6300, which has both a low-velocity and high-velocity component, and [O~I] \lambda5577, which has primarily a low-velocity component, retain the same shape throughout the orbit. Therefore these lines must originate outside of the immediate vicinity of the two stars and any circumstellar disks that participate in the orbital motion of the stars.

The author(s) of this abstract have provided an email address for comments about the abstract: marcosh@rice.edu

[Previous] | [Session 5] | [Next]

Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.