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Thresholds for the Dust Driven Mass Loss from C-rich AGB Stars

Published online by Cambridge University Press:  01 December 2006

Lars Mattsson ,
Rurik Wahlin  and
Susanne Höfner
Lars Mattsson
Affiliation:
Department of Astronomy & Space Physics, Uppsala University, Sweden, email: mattsson@astro.uu.se
Rurik Wahlin
Affiliation:
Department of Astronomy & Space Physics, Uppsala University, Sweden, email: mattsson@astro.uu.se
Susanne Höfner
Affiliation:
Department of Astronomy & Space Physics, Uppsala University, Sweden, email: mattsson@astro.uu.se
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Abstract

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It is well established that mass loss from AGB stars due to dust driven winds cannot be arbitrarily low. We model the mass loss from carbon rich AGB stars using detailed frequency-dependent radiation hydrodynamics including dust formation. We present a study of the thresholds for the mass loss rate as a function of stellar parameters based on a subset of a larger grid of such models and compare these results to previous theoretical work. Furthermore, we demonstrate the impact of the pulsation mechanism and dust formation for the creation of a stellar wind and how it affects these thresholds and briefly discuss the consequences for stellar evolution.

Keywords

stars: AGB and post-AGBatmospheresmass loss

References

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