Convective and non-convective mixing in AGB stars

Details Convective and non-convective mixing in AGB stars Convective and non-convective mixing in AGB stars

2007-09-03

arxiv.org/abs/0709.0197v1

Astronomy and Astrophysics

Astrophysics

Invited conference paper given at "Why Galaxies Care About AGB Stars", Vienna, August 7-11, 2006, to appear in ASP Conference

Scientific paper

We review the current state of modeling convective mixing in AGB stars. The focus is on results obtained through multi-dimensional hydrodynamic simulations of AGB convection, both in the envelope and the unstable He-shell. Using two different codes and a wide range of resolutions and modeling assumptions we find that mixing across convective boundaries is significant for He-shell flash convection. We present a preliminary quantitative analysis of this convectively induced extra mixing, based on a sub-set of our simulations. Other non-standard mixing will be discussed briefly.

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