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.
@article{arxiv.astro-ph/0306265,
title = {SACY - a Search for Associations Containing Young stars},
author = {Carlos A. O. Torres and Germano R. Quast and Ramiro de la Reza and Licio da Silva and Claudio H. F. Melo and Michael Sterzik},
journal= {arXiv preprint arXiv:astro-ph/0306265},
year = {2016}
}
Comments
8 pages, 2 figures, to appear in the Proceedings of Open Issues in Local Formation and Early Stellar Evolution, Ouro Preto, Brazil