THE EFFECT OF ARTIFICIAL VISCOSITY ON A HYDRODYNAMIC MODEL OF CEPHEIDS

Authors
TAKEUTI M ISHIDA T TANAKA Y
Citation
M. Takeuti et al., THE EFFECT OF ARTIFICIAL VISCOSITY ON A HYDRODYNAMIC MODEL OF CEPHEIDS, Monthly Notices of the Royal Astronomical Society, 294(2), 1998, pp. 224-228
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
294
Issue
2
Year of publication
1998
Pages
224 - 228
Database
ISI
SICI code
0035-8711(1998)294:2<224:TEOAVO>2.0.ZU;2-V
Abstract
The effect of artificial viscosity on a hydrodynamic simulation of ste llar radial pulsation is examined for the purpose of studying the depe ndence 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 Ceph eid instability strip, By increasing the parameters in the von Neumann -Richtmyer formula of artificial viscosity, we obtained a low growth r ate together with a small pulsation amplitude, The time-scale related to pulsation mode-switching is also increased.