Multi‐dimensional numerical simulations of type Ia supernova explosions

Röpke, F. K.

doi:10.1002/9783527619030.ch6

“…In multi-dimensional simulations (see [40,41] for recent reviews), the computational costs of modeling the explosion hydrodynamics is prohibitive to directly resolve all relevant scales as well as details of the nuclear processes. While the latter may be improved in the forthcoming years, and is meanwhile separated from the actual explosion simulations still maintaining a reasonable accuracy (for an approach based on reconstructing the nucleosynthesis from tracer particles, see [42,43]), even a drastic increase in computational capabilities will not allow for a resolution of all relevant scales in multi-dimensional simulations.…”

Section: Numerical Modelingmentioning

confidence: 99%

Thermonuclear Supernovae

Röpke¹

2008

Proceedings of Supernovae: Lights in the Darkness — PoS(SUPERNOVA)

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The application of Type Ia supernovae (SNe Ia) as distance indicators in cosmology calls for a sound understanding of these objects. Recent years have seen a brisk development of astrophysical models which explain SNe Ia as thermonuclear explosions of white dwarf stars. While the evolution of the progenitor is still uncertain, the explosion mechanism certainly involves the propagation of a thermonuclear flame through the white dwarf star. Three-dimensional hydrodynamical simulations allowed to study a wide variety of possibilities involving subsonic flame propagation (deflagrations), flames accelerated by turbulence, and supersonic detonations. These possibilities lead to a variety of scenarios. I review the currently discussed approaches and present some recent results from simulations of the turbulent deflagration model and the delayed detonation model.

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“…In multi-dimensional simulations (see [40,41] for recent reviews), the computational costs of modeling the explosion hydrodynamics is prohibitive to directly resolve all relevant scales as well as details of the nuclear processes. While the latter may be improved in the forthcoming years, and is meanwhile separated from the actual explosion simulations still maintaining a reasonable accuracy (for an approach based on reconstructing the nucleosynthesis from tracer particles, see [42,43]), even a drastic increase in computational capabilities will not allow for a resolution of all relevant scales in multi-dimensional simulations.…”

Section: Numerical Modelingmentioning

confidence: 99%