T Tauri Stars in the Scorpius Centaurus OB Association
Thomas Preibisch, Hans Zinnecker, Eike Guenther, Michael Sterzik,
Sabine Frink, & Siegfried Röser
Poster contribution at the
10th Workshop on Cool Stars, Stellar Systems, and the Sun,
ASP Conference Series, in press (1997)
We present the results from our intermediate resolution
spectroscopic survey for T Tauri stars
in the Scorpius Centaurus
OB association. In a 160 square-degree area in Upper Scorpius,
where 86 T Tauri stars were previously known,
we could identify 46 new T Tauri stars
by follow up observations of X-ray selected stars.
We also investigated
the completeness of our X-ray selected sample by observing
more than 100 stars that were not detected as X-ray sources,
but have proper motions indicating membership to ScoCen.
We found that none of these stars is a T Tauri star.
We conclude that our X-ray selected sample of T Tauri star seems to
be rather complete for stars with L_bol > 0.5 L_sun.
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