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J/AJ/124/404 Upper Scorpius OB association Lithium survey. II. (Preibisch, 2002)

Exploring the full stellar population of the Upper Scorpius OB association. Preibisch T., Brown A.G.A., Bridges T., Guenther E., Zinnecker H. <Astron. J. 124, 404 (2002)> =2002AJ....124..404P
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Equivalent widths Keywords: open clusters and associations: individual (Upper Scorpius) - stars: formation - stars: luminosity function, mass function - stars: pre-main-sequence Abstract: We investigate the stellar population and star formation history of the Upper Scorpius OB association, the most nearby region of recent massive star formation, over the full stellar mass range from 0.1 to 20M. The first part of this paper describes an extension of our large spectroscopic survey (Preibisch et al., published in 2001, Cat. J/AJ/121/1040) for low-mass pre-main-sequence (PMS) stars in Upper Scorpius. Using the multiobject spectrograph 2dF at the Anglo-Australian Telescope, we obtained spectra of 469 stars with magnitudes R=12.5-18.0 in a 6°2 area, on he nights of 2001 May 16-17. Among these, we find 68 new PMS stars, nearly all of them M-type stars, by their strong lithium absorption lines. The total area covered by our 2dF survey is now 9 deg2 and contains 166 new PMS stars. Combining these results with our earlier investigation (Preibisch & Zinnecker, 1999AJ....117.2381P) yields a sample of 250 PMS stars in the mass range ∼0.2 to ∼2M. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 57 166 PMS stars in Upper Scorpius detected in our 2dF survey
See also: J/A+A/333/619 : Upper Scorpius OB association Lithium survey (Preibisch+ 1998) J/AJ/121/1040 : PMS members of upper Scorpius OB association (Preibisch+ 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [USco-] 6- 20 A15 --- [PBB2002] Source name, USco-HHMMSS.s+DDMMSS (1) 22- 25 F4.1 mag Rmag The R-band magnitude 27- 30 F4.2 0.1nm EWLi Li (6708 Å) Equivalent Width 32- 37 F6.1 0.1nm EWHa Hα Equivalent Width 39- 40 A2 --- SpType Spectral type 42- 44 F3.1 mag AV The V-band extinction 46- 50 F5.3 [K] log(T) Log of the adopted effective temperature 52- 56 F5.2 [solLum] log(Lbol) Log of the bolometric luminosity
Note (1): The source name in the first column consists of the J2000 coordinates of the star. Identified as [PBB2002] USco JHHMMSS.s+DDMMSS in Simbad.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 27-Sep-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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