Computer Science
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..121w&link_type=abstract
NOAO Proposal ID #2010A-0121
Computer Science
Scientific paper
The most massive globular cluster in the Galaxy, Omega Centauri, has long been known to display a considerable range of metal abundance. More recent observations have shown a far more complex situation, with multiple red giant branches best explained by multiple star formation episodes during the cluster's first few billion years of life, and a split main sequence with the components likely having different helium abundances. A definitive star formation and chemical enrichment history is still lacking. The idea that Omega Centauri is the remnant (nucleus) of a dwarf galaxy accreted billions of years ago by the Milky Way is unproven. Deep and accurate photometry, and spectroscopy, can help disentangle the various evolutionary phrases of this cluster. Deep Near- IR photometry is particularly useful, and here we propose to obtain critical wide-field data that are essential for the interpretation of our deep high-resolution observations.
Bono Giuseppe
Calamida Annalisa
Stetson Peter
Walker Alistair
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