Nonlinear Beat Cepheid and RR Lyrae Models
Astrophysics
2009-11-07 v1 Fluid Dynamics
Abstract
The numerical hydrodynamic modelling of beat Cepheid behavior has been a long standing quest in which purely radiative models had failed consistently. We find that beat pulsations occur naturally when {\it turbulent convection} is accounted for in our hydrodynamics code. The development of a relaxation code and of a Floquet stability analysis greatly facilitates the search for and the analysis of beat Cepheid models. The conditions for the occurrence of beat behavior can be understood easily and at a fundamental level with the help of amplitude equations.
Keywords
Cite
@article{arxiv.astro-ph/0110076,
title = {Nonlinear Beat Cepheid and RR Lyrae Models},
author = {Z. Kollath and J. R. Buchler and R. Szabo and Z. Csubry},
journal= {arXiv preprint arXiv:astro-ph/0110076},
year = {2009}
}
Comments
8 pages, 5 figures, Astronomy and Astrophysics, submitted