Abstract
The scientific goal of the SACY (Search for Associations Containing Young-stars) was to identify possible associations of stars younger than the Pleiades Association among optical counterparts of the ROSAT X-ray bright sources. High-resolution spectra for possible optical counterparts later than G0 belonging to HIPPARCOS and/or TYCHO-2 catalogs were obtained in order to assess both the youth and the spatial motion of each target. More than 1000 ROSAT sources were observed, covering a large area in the Southern Hemisphere. The newly identified young stars present a patchy distribution in UVW and XYZ, revealing the existence of huge nearby young associations. Here we present the associations identified in this survey.
Based on observations made under the ON-ESO agreement for the joint operation of the 1.52 m ESO telescope and at the Observatório do Pico dos Dias (LNA/MCT), Brazil
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Torres, C.A.O., Quast, G.R., de la Reza, R., da Silva, L., Melo, C.H.F., Sterzik, M. (2003). Sacy — A Search for Associations Containing Young Stars. In: Lépine, J., Gregorio-Hetem, J. (eds) Open Issues in Local Star Formation. Astrophysics and Space Science Library, vol 299. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2600-5_9
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