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45 - Chemical evolution of the Galactic bulge

Published online by Cambridge University Press:  02 December 2009

B. Gibson
Affiliation:
University of Central Lancashire, Centre for Astrophysics, Preston PR1 2HE, UK
A. J. MacDonald
Affiliation:
University of Central Lancashire, Centre for Astrophysics, Preston PR1 2HE, UK
P. Sánchez-Blázquez
Affiliation:
University of Central Lancashire, Centre for Astrophysics, Preston PR1 2HE, UK
L. Carigi
Affiliation:
Instituto de Astronomía, UNAM, México, D.F., Mexico
Garik Israelian
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife
Georges Meynet
Affiliation:
Geneva Observatory
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Summary

The chemical evolution of the Galactic bulge is calculated by adopting a single-zone framework, with accretion of primordial gas on a free-fall timescale, assuming (i) a correspondingly rapid timescale for star formation and (ii) an initial mass function biased towards massive stars. We emphasise here the uncertainties associated with the underlying physics (specifically, stellar nucleosynthesis) and how those uncertainties are manifested in the predicted abundance-ratio patterns in the resulting present-day Galactic-bulge stellar populations.

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Publisher: Cambridge University Press
Print publication year: 2008

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