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Nonlinear δ Scuti models: The main sequence catastrophe?

  • R. F. Stellingwerf
1. ° Scuti Stars
Part of the Lecture Notes in Physics book series (LNP, volume 125)

Abstract

For nonlinear models of 0.4 M and 2.0 M δ Scuti stars, pulsation amplitudes obtained in this region depend critically upon artificial viscosity parameters. Models with limited viscosity attain huge amplitudes. Furthermore, it is found that nonlinear stability properties depend primarily upon the amplitude. Determination of the actual dissipation mechanism is thus crucial to our understanding of these objects, and probably other main sequence pulsators as well. At present the most likely mechanisms appear to be 1) dissipation in the atmosphere, corona and wind; 2) turbulent dissipation in the convective zones; 3) magnetic fields.

Keywords

Convective Zone Globular Cluster Turbulent Dissipation Viscosity Parameter Limited Viscosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Christy, R.F. 1974, Cepheid Modeling, G.S.F.C. publication, NASA-SP-383, p. 85.Google Scholar
  2. Stellingwerf, R.F. 1975, Ap. J., 195, 441.Google Scholar
  3. Stellingwerf, R.F. 1979, Ap. J., 227, 935.Google Scholar

Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • R. F. Stellingwerf
    • 1
  1. 1.Department of Physics and AstronomyRutgers UniversityNew BrunswickNew Jersey

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