Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.246..510b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 246, NO. 3/OCT1, P. 510, 1990
Astronomy and Astrophysics
Astronomy
38
Scientific paper
In previous studies of the variable white dwarfs, the effects of convection have been included only in the unperturbed models. This approach is inconsistent and the results obtained may be misleading. Here the simplest equations for the oscillation consistent with the standard mixing-length view of convection are introduced and the influence of turbulent viscosity on the g-mode solutions is discussed. It is shown that the turbulent viscosity is easily sufficient to prevent significant changes in the horizontal velocity with depth through the turbulent layer. This is in marked contrast to the rapid changes in phase and amplitude which have been found previously. The turbulent viscous dissipation rate exceeds the driving rate near the red edge. It may also account for the upper limit in the observed periods by damping modes of high radial order.
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