Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5820c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #58.20; Bulletin of the American Astronomical Society, Vol. 39, p.837
Other
Scientific paper
As part of our ongoing study of the dependence of G and K dwarf lithium (Li) depletion on metallicity in Hyades-aged (700Myr) star clusters, we present an analysis of high resolution (R=15,000), high S/N (200-500 per pixel) spectra of the Li I 6708 A region for 67 G and K dwarfs in the open cluster Praesepe. These dwarfs are photometric and proper motion members of Praesepe, and our radial velocity measurements verify that a majority of these stars are single star members. Praesepe's published [Fe/H] of +0.08 (which we refine) makes it a good comparison cluster to the Hyades ([Fe/H] +0.15) and other Hyades-aged clusters that we have studied: NGC 2539 ([Fe/H] 0.0), IC 4756 ([Fe/H] -0.1) and NGC 6633 ([Fe/H] -0.1). These previous clusters have all supported the predicted metallicity dependence of Li depletion from standard stellar evolution theory; Praesepe adds an important metallicity increment to these studies. This work has been supported by the National Science Foundation under grant AST-0607567.
Cummings Jeff
Deliyannis Constantine P.
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