Our recent inclusion of a simple one dimensional model equation for
time-dependent turbulent convection has led to two spectacular successes.
First, the modelling of the commonly observed phenonmenon beat Cepheid and beat
RR Lyrae pulsations, steady pulsations in which two modes are simultaneously
excited to large amplitudes, was an unsurmountable challenge to radiative
models, i.e. models that only considered energy transport by radiation.
Double-mode pulsations are now found quite naturally with turbulent convective
models. Second, radiative models had been incapable of reproducing the
light-curves of s Cepheids, i.e. Cepheids pulsating in their first overtone.
Again, the inclusion of turbulent convective models gives agreement with
observations.
Reviews:
see also for downloadable files Publications
Gottesman, S. T., Buchler, J. R. & Mahon, M. E. 2005, Nonlinear Dynamics in Astronomy and Physics: In Memory of Henry Kandrup, Annals of the New York Academy of Sciences, Vol. 1045.
Fry, J. N., Buchler, J. R. & Kandrup, H., 2001, The Onset of Nonlinearity in Cosmology, Proceedings of the Fifteenth Annual Florida Workshop in Nonlinear Astronomy and Physics, Annals New York Academy of Sciences, Vol. 927.
Buchler, J.R. & Kandrup, H., 2000, Astrophysical Turbulence and Convection,Proceedings of the Fourteenth Annual Florida Workshop in Nonlinear Astronomy and Physics, Annals of the New York Academy of Sciences, Vol. 898.
Updated November 2005