The effect of artificial viscosity on a hydrodynamic model of Cepheids

Details The effect of artificial viscosity on a hydrodynamic model of Cepheids The effect of artificial viscosity on a hydrodynamic model of Cepheids

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.294..224t&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 294, p. 224

Astronomy and Astrophysics

Astronomy

3

Viscosity, Stellar Oscillations, Cepheid Variables, Hydrodynamics, Light Curve, Luminous Intensity, Stellar Envelopes

Scientific paper

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.

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