Other
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..349b&link_type=abstract
NOAO Proposal ID #2010A-0349
Other
Scientific paper
The chemical evolution of the galaxy can be examined on a small scale locally by searching for evidence of enrichment by core collapse (type II) supernova explosions among stars belonging to the same star- forming complex. We propose to obtain high resolution spectroscopy of a sample of slowly rotating members of nearby, young stellar groups associated with the nearest star-forming complex: Scorpius-Centaurus. These spectra will be used to perform a precise spectroscopic abundance analysis to test for enrichment of the ~5 Myr-old Upper Scorpius region and neighboring regions by supernova explosions in the neighboring ~ 15 Myr-old Upper Centaurus Lupus and Lower Centaurus Crux subgroups. Enrichment by core-collapse supernovae can be traced by enhancements in oxygen and other alpha- element abundances compared to Fe-peak elements. These abundances can also be used for constraining the chemical homogeneity of members of Upper-Sco. This study will allow us to explore the processes of Galactic chemical evolution and SN enrichment on a small scale (< 0.1 kpc, <10-20 SN) in a complex with a relatively well constrained star formation history and high mass stellar membership.
Bubar Eric Joseph
Mamajek Eric E.
Pecaut Mark
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