Delayed detonation model for type IA supernovae
Abstract
Type Ia supernova explosions are described by means of models in which a period of deflagration near the center of carbon-oxygen white dwarf precedes the detonation. The volume and density of the white dwarf increase during slow subsonic burning, and this burning is transformed when certain critical conditions are met. The scenario is simulated numerically to give results of the gasdynamical event: all C-O fuel is burned; intermediate mass elements are produced in the outer layers; and approximately 1 solar mass or more of Fe-peak elements is produced during a delayed detonation. The results are compared to both detonation and deflagration models to consider the velocities of intermediate mass elements and of Fe-peak elements. The ratios obtained in the models are similar to those found in the solar neighborhood, and the detonation is shown to occur at low densities.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1991
- Bibcode:
- 1991A&A...245..114K
- Keywords:
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- Astronomical Models;
- Detonation;
- Gas Dynamics;
- Supernovae;
- White Dwarf Stars;
- Computational Astrophysics;
- Flame Propagation;
- Thermonuclear Reactions;
- Astrophysics