Three Dimensional Models of RR Lyrae Pulsation
Robert F. Stellingwerf
TL;DR
This paper presents 3D hydrodynamic models of RR Lyrae star pulsations, exploring turbulence, instabilities, and shock-driven outflows to better understand stellar pulsation dynamics.
Contribution
It introduces a novel 3D polytropic model of RR Lyrae pulsation incorporating Rayleigh-Taylor and Richtmyer-Meshkov instabilities.
Findings
Identification of Rayleigh-Taylor instability effects
Observation of shock-driven outflows
Potential significance of Richtmyer-Meshkov instability
Abstract
Preliminary polytropic models of a pulsating star have been constructed using the 3-D Hydrocode SPHC. An embedded Rayleigh-Taylor unstable layer is used to study the interaction of pulsation and turbulence. The possible importance of Richtmyer-Meshkov instability is noted for large amplitude pulsation. In addition, this model spontaneously generates a strong, hot, shock driven outflow at the upper boundary.
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Taxonomy
TopicsParticle accelerators and beam dynamics