Radial Stellar Pulsation and Three-Dimensional Convection. III. Comparison of Two-Dimensional and Three-Dimensional Convection Effects on Radial Pulsation

Abstract

We have developed a multidimensional radiation hydrodynamics code to simulate the interaction of radial stellar pulsation and convection for full amplitude pulsating models. Convection is computed using large eddy simulations. Here we perform three-dimensional simulations of RR Lyrae stars for comparison with previously reported two-dimensional simulations. We find that the time dependent behavior of the peak convective flux on pulsation phase is very similar in both the two-dimensional and three-dimensional calculations. The growth rates of the pulsation in the two-dimensional calculations are about $0.1\%$ higher than in the three-dimensional calculations.The amplitude of the light curve for a 6500 K RR Lyrae model is essentially the same for our 2D and 3D calculations, as is the rising light curve. There are differences in slope at various times during falling light.

References in corpus (1)

• The State of Cepheid Pulsation Theory

Cited by in corpus (6)

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• Calibration of the convective parameters in stellar pulsation hydrocodes
• Radial Stellar Pulsation and Three-Dimensional Convection. IV. Full Amplitude Three-Dimensional Solutions
• Is the Blazhko effect the beating of a near-resonant double-mode pulsation?
• Convective shells in the interior of Cepheid variable stars: overshooting models based on hydrodynamic simulations
• A new framework of multidimensional pulsating stellar envelopes I.: Properties of turbulent convection in static RR Lyrae envelope models with SPHERLS