Flame fronts in Supernovae Ia and their pulsational stability

Abstract

The structure of the deflagration burning front in type Ia supernovae is considered. The parameters of the flame are obtained: its normal velocity and thickness. The results are in good agreement with the previous works of different authors. The problem of pulsation instability of the flame, subject to plane perturbations, is studied. First, with the artificial system with switched-off hydrodynamics the possibility of secondary reactions to stabilize the front is shown. Second, with account of hydrodynamics, realistic EOS and thermal conduction we can obtain pulsations when Zeldovich number was artificially increased. The critical Zeldovich numbers are presented. These results show the stability of the flame in type Ia supernovae against pulsations because its effective Zeldovich number is small.

12 pages, 11 figures

References in corpus (5)

• A three-dimensional deflagration model for Type Ia supernovae confronted with observations
• Type Ia Supernova: Calculations of Turbulent Flames Using the Linear Eddy Model
• Thermonuclear fusion in dense stars: Electron screening, conductive cooling, and magnetic field effects
• Coulomb corrections and thermo-conductivity of a dense plasma
• Simple Model of Propagating Flame Pulsations

Cited by in corpus (5)

• Dark Matter Triggers of Supernovae
• Pulsational Pair-instability Supernovae. I. Pre-collapse Evolution and Pulsational Mass Ejection
• Exploration of Aspherical Ejecta Properties in Type Ia Supernova: Progenitor Dependence and Applications to Progenitor Classification
• Turbulence model for simulation of the flame front propagation in SNIa
• Thermal-Diffusional Instability in White Dwarf Flames: Regimes of Flame Pulsation