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A. R. Daane, J. R. King (Clemson University)
Using new high-resolution spectroscopic observations from both the McDonald Observatory 2.7-m and Kitt Peak National Observatory 4-m, we observed four candidates of the Ursa Major (UMa) moving group previously suggested to instead belong to a significantly older kinematic assemblage. The iron abundances we measure strongly suggest that these stars are not UMa members, but form a more metal-rich group of stars. The high and similar metallicities support previous suggestions that these stars belong to a field kinematic structure with a uniform age. This work has been supported by a grant from the Curry Foundation and NSF awards AST-0086576 and AST-0239518.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.