Three-dimensional Structure of Incomplete Carbon–Oxygen Detonations in Type Ia Supernovae
Carbon–oxygen (CO) detonation with reactions terminating either after burning of ^12 C in the leading ^12 C + ^12 C reaction or after burning of ^12 C and ^16 O to Si-group elements may occur in the low-density outer layers of exploding white dwarfs and be responsible for the production of intermed...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/adb0c1 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Carbon–oxygen (CO) detonation with reactions terminating either after burning of ^12 C in the leading ^12 C + ^12 C reaction or after burning of ^12 C and ^16 O to Si-group elements may occur in the low-density outer layers of exploding white dwarfs and be responsible for the production of intermediate-mass elements observed in the outer layers of Type Ia supernovae. Basic one-dimensional properties of CO-detonations have been summarized in our previous work. This paper presents the results of two- and three-dimensional numerical simulations of low-density CO-detonations and discusses their multidimensional stability, cellular structure, and propagation through a constant low-density background. We find three-dimensional CO detonations to be strikingly different from their one-dimensional and two-dimensional counterparts. Three-dimensional detonations are significantly more robust and capable of propagating without decay compared to highly unstable and marginal one- and two-dimensional detonations. The detonation cell size and whether burning of ^12 C in a three-dimensional detonation wave is followed by the subsequent ^16 O burning are sensitive to both the background density and the initial ^12 C to ^16 O mass ratio. We also discuss the possible implications for understanding the observed early-time bumps in light curves. |
|---|---|
| ISSN: | 1538-4357 |