Equations of state and bump Cepheids. II  Nonlinear results
Abstract
The HummerMihalasDappen (MHD, 1988) and a simple Saha type equation of state are used to obtain nonlinear pulsation characteristics of a grid of models spanning the Hertzsprung sequence (Cox, 1974). The grid of models is taken from Simon and Davis (1983) who used the Los Alamos equation of state in their computations. The result is a sensitivity analysis of theoretical nonlinear bump Cepheid models to the equation of state employed in the calculation. The results obtained with these equations of state are different, though not enough to resolve the Cepheid bump mass discrepancy (Stobie 1969; Simon and Schmidt, 1976; Simon, 1986).
 Publication:

Astronomy and Astrophysics
 Pub Date:
 June 1992
 Bibcode:
 1992A&A...259..175K
 Keywords:

 Cepheid Variables;
 Equations Of State;
 Nonlinear Equations;
 Stellar Structure;
 Hydrodynamic Equations;
 Stellar Oscillations;
 Astrophysics