Upper Scorpius OB association Lithium survey (Preibisch+ 1998)

Details Upper Scorpius OB association Lithium survey (Preibisch+ 1998) Upper Scorpius OB association Lithium survey (Preibisch+ 1998)

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat..33330619p&link_type=abstract

VizieR On-line Data Catalog: J/A+A/333/619. Originally published in: 1998A&A...333..619P

Computer Science

Stars: Pre-Main Sequence, Equivalent Widths, Proper Motions, Associations: Stellar

Scientific paper

We present the results of an intermediate resolution spectroscopic survey for pre-main sequence (PMS) stars in the Upper Scorpius OB association. In a 160 square-degree area we were able to identify 39 new PMS stars by follow up observations of X-ray selected stars with the multi object spectrograph FLAIR at the UK Schmidt Telescope. 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 Upper Sco. While the new X-ray selected PMS stars with known proper motions have kinematics consistent with membership, none of the X-ray quiet proper motion candidates is a PMS star. We conclude that our X-ray selected sample of PMS stars seems to be rather complete. For stars in the magnitude interval 11.5<~B<~13.5 we derive a conservative lower limit of 75% completeness. (2 data files).

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