Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-01-20
New Astron.Rev. 46 (2002) 469-474
Astronomy and Astrophysics
Astrophysics
9 pages, review presented at Ringberg Workshop on "Astronomy with Radioactivites", to appear in New Astronomy Reviews
Scientific paper
The Asymptotic Giant Branch (AGB) phase is very short but its importance is seen in its nucleosynthesis. A revolution in stellar modelling has taken place in the last 20 years, inspired jointly by this rich nucleosynthesis and partly by new data. For example, the isotopic data coming from pre-solar grains (see this volume) forces theorists to include species that were previously ignored, species which are energetically of no importance (i.e. they play no role in determining the stellar structure) but which can be used to constrain the models. Nucleosynthesis is now important as a tracer of temperature and mixing, and not simply a by-product of energy generation. But along with these advances come more quantitative demands. It is now increasingly important to know what is known well and what is less sure. This is the goal of this paper.
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