Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-12-01
Astronomy and Astrophysics
Astrophysics
14 pages including 6 figures, aastex preprint, accepted to Astronomical Journal
Scientific paper
10.1086/426332
We present 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 6707 clearly split into two components as the primary and secondary orbit one another, as did the permitted line He I 5876. Unlike the photospheric features, the forbidden lines of [O I] 6300 and [O I] 5577, 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.
Hartigan Patrick
Huerta Marcos
White Richard J.
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