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| Paper: |
Current Status of Stellar Evolutionary Models for AGB Stars |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
3 |
| Authors: |
Karakas, A. I. |
| Abstract: |
Asymptotic giant branch (AGB)
stars play an important role in determining the chemical and
evolutionary properties of galaxies.
Stellar evolutionary models of AGB stars provide a good qualitative
match to observations, although detailed comparisons reveal problems
with our understanding of important physical
processes such as mixing. The main stellar modelling uncertainties
include our inability to accurately calculate convection in stars,
and the rates of mass loss during the AGB. The inability to model
convection is especially problematic during the AGB owing to the
occurrence of the third dredge-up and hot bottom burning,
while mass loss will limit the number of mixing episodes.
In these proceedings the current status of evolutionary models of
AGB stars is reviewed, along with a discussion of how convection in
particular affects AGB models. Finally, we discuss how AGB stars in
the Magellanic Cloud may be used as probes of AGB evolution and
nucleosynthesis. |
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