Three-dimensional Delayed-Detonation Model of Type Ia Supernovae
By V. Gamezo, A. Khokhlov, E. Oran. 2004
197 citations recorded by the source corpus.
We study a Type Ia supernova explosion using large-scale three-dimensional numerical simulations based on reactive fluid dynamics with a simplified mechanism for nuclear reactions and energy release. The initial deflagration stage of the explosion involves a subsonic turbulent thermonuclear flame propagating in the gravitational field of an expanding white dwarf. The deflagration produces an inhomogeneous mixture of unburned carbon and oxygen with intermediate-mass and iron-group elements in central parts of the star. During the subsequent detonation stage, a supersonic detonation wave propagates through the material unburned by the deflagration. The total energy released in this delayed-detonation process, (1.3-1.6) × 1051 ergs, is consistent with a typical range of kinetic energies obtained from observations. In contrast to the deflagration model, which releases only about 0.6 × 1051 ergs, the delayed-detonation model does not leave carbon, oxygen, and intermediate-mass elements in central parts of a white dwarf. This removes the key disagreement between three-dimensional simulations and observations, and makes a delayed detonation the mostly likely mechanism for Type Ia supernova explosions.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/dd70df93cba4562ed7d94b844e87645dfea7b1e5
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Citations in the corpus
- THE SPECTROSCOPIC DIVERSITY OF TYPE Ia SUPERNOVAE (2000, background): “Recent multidimensional simulations highlight the importance of hydrodynamical instabilities during the deflagration phase (e.g., Gamezo et al. 2005; Röpke & Niemeyer 2007), and provide a physical basis for the deflagration-todetonation transition (DDT; e.g., Woosley et al. 2009), although this…”
- Constraints on the Physics of Type Ia Supernovae from the X-Ray Spectrum of the Tycho Supernova Remnant (2005, background): “Some simulations have explored delayed detonation explosions in three dimensions (Gamezo et al. 2005), but without providing any further insight into the physical mechanism that governs the transition.”
- NUCLEOSYNTHESIS IN TWO-DIMENSIONAL DELAYED DETONATION MODELS OF TYPE Ia SUPERNOVA EXPLOSIONS (2010, methodology): “The overall abundance distribution of the 3D DDT models of Gamezo et al. (2005), on the other hand, is similar to our 2D models, producing the stratified configuration.”