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Search for associations containing young stars (SACY). I. Sample and searching method
We report results from a high-resolution optical spectroscopic surveyaimed to search for nearby young associations and young stars amongoptical counterparts of ROSAT All-Sky Survey X-ray sources in theSouthern Hemisphere. We selected 1953 late-type (B-V~≥~0.6),potentially young, optical counterparts out of a total of 9574 1RXSsources for follow-up observations. At least one high-resolutionspectrum was obtained for each of 1511 targets. This paper is the firstin a series presenting the results of the SACY survey. Here we describeour sample and our observations. We describe a convergence method in the(UVW) velocity space to find associations. As an example, we discuss thevalidity of this method in the framework of the β Pic Association.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Yilanci |
| Sað Açýklýk: | 17h39m55.63s |
| Yükselim: | -23°03'40.9" |
| Görünürdeki Parlaklýk: | 8.587 |
| Uzaklýk: | 80.841 parsek |
| özdevim Sað Açýklýk: | -12.1 |
| özdevim Yükselim: | -32.6 |
| B-T magnitude: | 9.315 |
| V-T magnitude: | 8.648 |
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