Convective and non-convective mixing in AGB stars

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 assump...

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Bibliographic Details
Published in:arXiv.org 2007-09
Main Authors: Falk Herwig, Freytag, Bernd, Fuchs, Tyler, Hansen, James P, Hueckstaedt, Robert M, Porter, David H, Timmes, Francis X, Woodward, Paul R
Format: Article
Language:English
Subjects:
Asymptotic giant branch stars
Computer simulation
Convection
Helium
Modelling
Quantitative analysis
Online Access:Get full text
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Summary: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.
ISSN:2331-8422