Journal Article

The effect of artificial viscosity on a hydrodynamic model of Cepheids

M. Takeuti, T. Ishida and Y. Tanaka

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 294, issue 2, pages 224-228
Published in print February 1998 | ISSN: 0035-8711
Published online February 1998 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-8711.1998.01191.x
The effect of artificial viscosity on a hydrodynamic model of Cepheids

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Abstract

The effect of artificial viscosity on a hydrodynamic simulation of stellar radial pulsation is examined for the purpose of studying the dependence of the modal coupling on the sharpness of the shock front. The model used in our study is a 2.5-d first-overtone pulsator in the Cepheid instability strip. By increasing the parameters in the von Neumann—Richtmyer formula of artificial viscosity, we obtained a low growth rate together with a small pulsation amplitude. The time-scale related to pulsation mode-switching is also increased.

Keywords: hydrodynamics; stars: oscillations; Cepheids

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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