Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pabei..24...54z&link_type=abstract
Progress in Astronomy (ISSN 1000-8349), Vol. 24, No. 1, p. 54 - 61 (2006)
Astronomy and Astrophysics
Astrophysics
1
Astrophysics, Agb Stars, Review, Neutron Capture: S-Process, Pb Stars, Post-Agb Stars, S+R Stars
Scientific paper
In this paper a review of the theoretical investigation of nucleosynthesis and evolution of low mass AGB stars is presented. AGB stars are the source for the main component of the s-process. Some details of the s-process in AGB stars seem now to be well understood, and yet others remain a mystery, such as the mechanism responsible for the observed spread of Pb abundance of metal-poor AGB stars. The present status of post-AGB stars is also introduced. Special abundance pattern of the elements, in particular of the neutron-capture elements, is observed in some metal-poor stars recently. It shows a strong enrichment in "r" and "s" process elements. The possible origins of this abundance pattern and especially of the strong enhancement of both "s" and "r" elements are discussed. The new challenge of AGB modeling, namely the study of C-rich and s-rich very metal-poor stars, is also discussed.
Cui Wen-Yuan
Zhang Bo
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