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Behaviour of Pulsations in Hydrodynamic Models of Massive Stars

Published online by Cambridge University Press:  23 January 2015

C. C. Lovekin  and
J. A. Guzik
C. C. Lovekin
Affiliation:
Department of Physics, Mount Allison University, Sackville, NB, Canada email: clovekin@mta.ca
J. A. Guzik
Affiliation:
XTD-NTA, Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

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We have calculated the pulsations of massive stars using a nonlinear hydrodynamic code including time-dependent convection. The basic structure models are based on a standard grid published by Meynet et al. (1994). Using the basic structure, we calculated envelope models, which include the outer few percent of the star. These models go down to depths of at least 2 million K. These models, which range from 40 to 85 solar masses, show a range of pulsation behaviours. We find models with very long period pulsations (> 100 d), resulting in high amplitude changes in the surface properties. We also find a few models that show outburst-like behaviour. The details of this behaviour are discussed, including calculations of the resulting wind mass-loss rates.

Keywords

stars: oscillationsstars: variables: other
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 176 - 181
Copyright
Copyright © International Astronomical Union 2015 

References

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