Physics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011noao.prop..276m&link_type=abstract
NOAO Proposal ID #2011A-0276
Physics
Scientific paper
The Galactic [O/H] versus age and [O/Fe] versus [Fe/H] relationships are of great importance for our understanding of Galactic chemical evolution. Although important questions persist at the most metal-poor end of field star studies ([Fe/H] < -2), two intriguing issues have emerged from studies of open clusters: (1) a strong O versus age relationship has been reported, and (2) in sharp contrast to field star data, open clusters show no robust correlation of O to Fe. Whereas field stars do not generally allow exploration of the age parameter, open clusters can uniquely provide accurate knowledge of both age and [Fe/H]. However, previous studies have been limited by range in [Fe/H] and by sample size. We propose to test the reality of the above intriguing results by further extending our WIYN/Hydra and MMT/Hectochelle sample to two old open clusters, M67 (4.3 Gyr) and NGC 188 (7.1 Gyr), giving us the critical means to test the chemical evolution of oxygen in a wide and well sampled age range.
Deliyannis Constantine P.
Maderak Ryan M.
Szentgyorgyi Andrew
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