Determining Metallicities of Open Clusters

Details Determining Metallicities of Open Clusters Determining Metallicities of Open Clusters

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..481j&link_type=abstract

NOAO Proposal ID #2007A-0481

Physics

Scientific paper

We propose to derive [Fe/H] values of four moderately old open clusters, NGC 2360, NGC 2477, NGC 2660, and NGC 3960, using Hydra on the CTIO Blanco 4-m telescope. This information will be used in conjunction with multicolor photometric data from HST, as well as newly proposed CTIO 0.9m photometry, to derive ages from the cluster white dwarfs but also from the main sequence turn off. Precise metallicities for these clusters will allow us to break parameter degeneracies in the color- magnitude diagram between metallicity, distance, and reddening, in order to obtain more precise values for the cluster parameters, specifically age. This is part of our ongoing effort to use open clusters to calibrate ages obtained from main sequence evolution theory and white dwarf cooling theory.

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