Search for young low-mass stars in a ROSAT selected sample south of the Taurus-Auriga molecular clouds

Details Search for young low-mass stars in a ROSAT selected sample south of the Taurus-Auriga molecular clouds Search for young low-mass stars in a ROSAT selected sample south of the Taurus-Auriga molecular clouds

1996-12-19

arxiv.org/abs/astro-ph/9612193v1

Astron.Astrophys.Suppl.Ser. 124 (1997) 449

Astronomy and Astrophysics

Astrophysics

19 pages, 8 figures, l-aa.sty LaTeX style. Astronomy & Astrophys. Suppl. Series, in press

Scientific paper

10.1051/aas:1997202

We present results of intermediate resolution spectroscopy of 131 optical counterparts to 115 ROSAT All-Sky Survey X-ray sources south of the Taurus-Auriga dark cloud complex. These objects have been selected as candidate young stars from a total of 1084 ROSAT sources in a about 300 square degree area. We identify 30 objects as low-mass PMS stars on the basis of the Li 6708 doublet in their spectrum, a signature of their young age. All these stars have a spectral type later than F7 and show spectral characteristics typical of weak-line and post-T Tauri stars. The presence of young objects several parsecs away from the regions of ongoing star formation is discussed in the light of the current models of T Tauri dispersal.

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