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Evolution of massive AGB stars

Published online by Cambridge University Press:  25 March 2006

T. Montmerle ,
C. Kahane  and
L. Siess
L. Siess*
Affiliation:
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, CP 226, 1050 Brussels, Belgium
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Abstract

The evolution of stars in the mass range 7–12 M๏ is characterized bythe off-center ignition of carbon in condition of partially degeneracyfollowed by the propagation of a convectively bound flame and the formationof a neon-oxygen core. In this chapter, we review the evolutionaryfeatures of these peculiar stars and pay a special attention to thethermally pulsing super-AGB phase and associated nucleosynthesis. Theevolution toward electron capture supernovae for the most massive membersof this class is briefly mentioned. In light of new computations, we alsodiscuss the question of Mup, the critical mass above which carbon ignitesas well as Mn, the minimum mass for the formation of a neutron star andanalyze the dependence of these transition masses on metallicity.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 19: Stars and Nuclei: A Tribute to Manuel Forestini , 2006 , pp. 103 - 124
Copyright
© EAS, EDP Sciences, 2006

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