The connection between mass loss and nucleosynthesis

Details The connection between mass loss and nucleosynthesis The connection between mass loss and nucleosynthesis

2008-01-03

arxiv.org/abs/0801.0557v1

Astronomy and Astrophysics

Astrophysics

8 pages, including 3 colour figures. To appear in the AIP proceedings of "The IXth Torino Workshop on Evolution and Nucleosynt

Scientific paper

I discuss the relationship between mass loss and nucleosynthesis on the Asymptotic Giant Branch (AGB). Because of thermal pulses and possibly other mixing processes, products of nucleosynthesis can be brought to the surface of AGB stars, increasingly so as the star becomes more luminous, cooler, and unstable against pulsation of its tenuous mantle. As a result, mass loss is at its most extreme when dredge-up is too. As the high rate of mass loss truncates AGB evolution, it determines the enrichment of interstellar space with the AGB nucleosynthesis products. The changing composition of the stellar atmosphere also affects the mass-loss process, most obviously in the formation of dust grains - which play an important role in driving the wind of AGB stars.

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