Protostars and Planets VI, Heidelberg, July 15-20, 2013
A New Star-Forming Region in Scorpius-Centaurus
Nguyen, Duy Cuong (University of Rochester)
Mamajek, Eric (University of Rochester)
Pecaut, Mark (University of Rochester)
We present the results of a survey of ~70 stars in the nearby Scorpius-Centaurus OB association based mainly on high-resolution spectra from the Magellan Clay 6.5-m telescope. A subsample of these stars are lithium rich, have common velocities, and are clustered near the southeastern part of the Upper Centaurus-Lupus sub-region of Scorpius-Centaurus. Given their separation away from known members, clustering, and youth, we believe that many of these stars constitute a new sub-region of Scorpius-Centaurus, which we propose to call \"Lower Scorpius\". For this new group, we estimated stellar parameters including temperature, surface gravity, metallicity, radial velocity, and projected rotational velocity.
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