Chemical Abundances of Inner Halo Globular Clusters

Details Chemical Abundances of Inner Halo Globular Clusters Chemical Abundances of Inner Halo Globular Clusters

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...19l&link_type=abstract

NOAO Proposal ID #1999A-0019

Computer Science

Scientific paper

We propose to obtain detailed elemental abundance ratios of a sample of metal-rich and metal-poor globular clusters in the inner Galaxy (R_GC <=2.5 kpc). All these clusters have been observed with HST WFPC2, so excellent main sequence data are forthcoming. But accurate relative ages require accurate relative heavy element abundance ratios, and while good relative mean metallicities have been estimated from the Ca II IR triplet, more detailed [X/Fe] results are needed. Further, similarities in [(alpha)/Fe] would suggest SNe II enrichment only and a small difference in ages, while differences in [(alpha)/Fe] would indicate a prolonged period of cluster formation and metal enrichment. This continues a program from last year, not yet completed due to remarkably ugly observing conditions.

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