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HD 116645


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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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观测天体数据

星座:半人馬座
右阿森松:13h25m29.42s
赤纬:-36°15'56.5"
视星:9.074
右阿森松适当运动:-34.7
赤纬适当运动:-9.9
B-T magnitude:10.001
V-T magnitude:9.151

目录:
适当名称
HD 1989HD 116645
TYCHO-2 2000TYC 7276-660-1
USNO-A2.0USNO-A2 0525-16151142
HIPHIP 65501

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