Other
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4401b&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #44.01; Bulletin of the American Astronomical Society, Vol. 34, p.1170
Other
5
Scientific paper
The enrichment of various chemical elements with time in the Galaxy reveals the history of massive star formation and the production of supernovae. We have embarked on a study of elemental abundances in unevolved G stars in star clusters of a range in age to trace the evolution and mixing in the galactic disk. We have obtained Keck/HIRES spectra of 17 Hyades stars with temperatures between 5000 and 6200 K and high signal-to-noise ratios (typically 500 - 700) in order to determine chemical abundances of G dwarfs in this 700 Myr old cluster. The spectra cover 5700 - 8100 A with some inter-order gaps. We have redetermined Fe and Li abundances and find good agreement with earlier results. Abundances for O and C and some other alpha-elements have been found as well as abundances of other light elements, Fe-peak elements, and rare earth elements. We compare the Hyades results with those from the old open cluster, M67. The Hyades at 700 Myr is metal-rich with [Fe/H] = +0.16 while M67 at 4.5 Gyr has solar metallicity of -0.04. Compared to M67, the Hyades has somewhat larger enhancements of C and O.
Beard J. L.
Boesgaard Ann Merchant
King Jeremy R.
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