Bulge Formation Scenarios vs. the Observations

Details Bulge Formation Scenarios vs. the Observations Bulge Formation Scenarios vs. the Observations

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.4004n&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #40.04; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

Recent metallicity and abundance determinations in the nuclear bulge allow a detailed comparison with scenarios of bulge formation. We employ the YREC stellar evolution code to generate model color-magnitude diagrams with a wide variety of assumptions about the duration of star formation, helium enrichment and age spread, and compare these to large photometric studies in the optical and infrared. Our models incorporate the latest observationally determined abundances. In particular, we explore the usefulness of the temperature and abundance distribution along the horizontal branch to constrain formation scenarios. We previously employed these methods to investigate hypotheses of high helium-abundance subpopulations in Omega Centauri.

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