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Towards a low metallicity carbon star spectral library

Published online by Cambridge University Press:  01 December 2006

R. Wahlin ,
L. Mattsson ,
S. Höfner  and
B. Aringer
R. Wahlin
Affiliation:
Department of Astronomy and Space Physics, Uppsala University, Box 515, SE-751 20 UppsalaSweden email: rurik.wahlin@astro.uu.se
L. Mattsson
Affiliation:
Department of Astronomy and Space Physics, Uppsala University, Box 515, SE-751 20 UppsalaSweden email: rurik.wahlin@astro.uu.se
S. Höfner
Affiliation:
Department of Astronomy and Space Physics, Uppsala University, Box 515, SE-751 20 UppsalaSweden email: rurik.wahlin@astro.uu.se
B. Aringer
Affiliation:
Department of Astronomy, University of Vienna, 1180 Wien, Türkenschanzstrae 17, Austria email: aringer@astro.univie.ac.at
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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
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 105 - 106
Copyright
Copyright © International Astronomical Union 2007