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Hydrodynamical Modeling of Double-Mode Pulsation

Published online by Cambridge University Press:  12 April 2016

Zoltán Kolláth
Zoltán Kolláth*
Affiliation:
Konkoly Observatory, H-1525 Budapest, P.O. Box 67, Hungary

Abstract

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The hydrodynamical modeling of steady double-mode (DM) pulsations has been a long-standing quest. Recent improvements in turbulent-convective pulsation codes provide a natural way to calculate nonlinear DM oscillations. The eddy viscosity plays a crucial role in these models. We present models both for RRd and beat Cepheid variables and for different chemical compositions. Simple nonresonant amplitude equations capture the DM phenomenon, giving an overview of modal selection on the HR diagram.

Type
Part 5. Theoretical Models of Classical Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 356 - 361
Copyright
Copyright © Astronomical Society of the Pacific 2000

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