Volume 460, Number 3, December IV 2006
|Page(s)||695 - 708|
|Section||Galactic structure, stellar clusters, and populations|
|Published online||12 September 2006|
Search for associations containing young stars (SACY)
I. Sample and searching method
Laboratório Nacional de Astrofísica/MCT, Rua Estados Unidos 154, 37504-364 Itajubá, Brazil e-mail: firstname.lastname@example.org
2 Observatório Nacional/MCT, 20921-400 Rio de Janeiro, Brazil
3 European Southern Observatory, Casilla 19001, Santiago 19, Chile
4 Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Accepted: 12 August 2006
We report results from a high-resolution optical spectroscopic survey aimed to search for nearby young associations and young stars among optical counterparts of ROSAT All-Sky Survey X-ray sources in the Southern Hemisphere. We selected 1953 late-type (), potentially young, optical counterparts out of a total of 9574 1RXS sources for follow-up observations. At least one high-resolution spectrum was obtained for each of 1511 targets. This paper is the first in a series presenting the results of the SACY survey. Here we describe our sample and our observations. We describe a convergence method in the (UVW) velocity space to find associations. As an example, we discuss the validity of this method in the framework of the β Pic Association.
Key words: stars: pre-main sequence / stars: formation / stars: kinematics / stars: rotation / stars: abundances / open clusters and associations: individual: β Pictoris
© ESO, 2006
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