Forbidden Line Emission in the Eccentric Spectroscopic Binaries DQ Tauri and UZ Tauri E
Monitored Over an Orbital Period
Huerta, M., Hartigan, P. (Rice) and White, R. (UT)
We present echelle spectroscopy of the close premain-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% of the phase of UZ Tau E. As expected, photospheric lines such
as Li I 6707 clearly split into two components while 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 the immediate
vicinity of the two stars and any circumstellar disks that participate in the
orbital motion of the stars.
Journal of publication: AJ 129, 985 (2005).