Abudance Ratios of Bulge Giants in Baade's Window

Details Abudance Ratios of Bulge Giants in Baade's Window Abudance Ratios of Bulge Giants in Baade's Window

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.7706f&link_type=abstract

American Astronomical Society Meeting 205, #77.06; Bulletin of the American Astronomical Society, Vol. 36, p.1474

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We will present abundance results from our Keck/HIRES echelle observations of giants in the Galactic Bulge. Enhanced [alpha/Fe] ratios at very high metallicities ([Fe/H] > +0.3) and very old ages indicate that the primary enrichment process of the bulge was Type II supernovae. However, the form of alpha-element enhancements changes at high metallicity, suggesting that additional astrophysical events (such as pre-explosion mass loss, IMF changes, and/or metallicity-dependent yields) may have to be invoked to explain the observations. We will also present results for the Fe-group and neutron-capture elements in the bulge.

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