SIMBAD references

2012AJ....144....8S - Astron. J., 144, 8 (2012/July-0)

New members of the Scorpius-Centaurus complex and ages of its sub-regions.

SONG I., ZUCKERMAN B. and BESSELL M.S.

Abstract (from CDS):

We have spectroscopically identified ∼100 G-, K-, and M-type members of the Scorpius-Centaurus complex. To deduce the age of these young stars we compare their Li λ6708 absorption line strengths against those of stars in the TW Hydrae association and β Pictoris moving group. These line strengths indicate that Sco-Cen stars are younger than β Pic stars whose ages of ∼12 Myr have previously been derived from a kinematic traceback analysis. Our derived age, ∼10 Myr, for stars in the Lower Centaurus Crux and Upper Centaurus Lupus subgroups of ScoCen is younger than previously published ages based on the moving cluster method and upper main-sequence fitting. The discrepant ages are likely due to an incorrect (or lack of) cross-calibration between model-dependent and model-independent age-dating methods.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual (Scorpius OB2, Lower Centaurus-Crux) - open clusters and associations: individual (Upper Centaurus-Lupus, Upper Scorpius) - stars: activity - stars: kinematics and dynamics - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/144/8): table1.dat>

Nomenclature: Table 1: [SZB2012] NNN (Nos 1-104).

Simbad objects: 138

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