Three-dimensional Structure of Incomplete Carbon-Oxygen Detonations in Type Ia Supernovae
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866916592330211328 |
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| author | Khokhlov, A. Dominguez, I. Chtchelkanova, A. Y. Hoeflich, P. Baron, E. Krisciunas, K. Phillips, M. Suntzeff, N. Wang, L. |
| author_facet | Khokhlov, A. Dominguez, I. Chtchelkanova, A. Y. Hoeflich, P. Baron, E. Krisciunas, K. Phillips, M. Suntzeff, N. Wang, L. |
| contents | Carbon-oxygen (CO) detonation with reactions terminating either after burning of C$^{12}$ in the leading C$^{12}$ + C$^{12}$ reaction or after burning of C$^{12}$ and O$^{16}$ 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 C$^{12}$ in a three-dimensional detonation wave is followed by the subsequent O$^{16}$ burning is sensitive to both the background density and the initial C$^{12}$ to O$^{16}$ mass ratio. We also discuss the possible implications for understanding the observed early time bumps in light-curves. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_19190 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Three-dimensional Structure of Incomplete Carbon-Oxygen Detonations in Type Ia Supernovae Khokhlov, A. Dominguez, I. Chtchelkanova, A. Y. Hoeflich, P. Baron, E. Krisciunas, K. Phillips, M. Suntzeff, N. Wang, L. Solar and Stellar Astrophysics Plasma Physics Carbon-oxygen (CO) detonation with reactions terminating either after burning of C$^{12}$ in the leading C$^{12}$ + C$^{12}$ reaction or after burning of C$^{12}$ and O$^{16}$ 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 C$^{12}$ in a three-dimensional detonation wave is followed by the subsequent O$^{16}$ burning is sensitive to both the background density and the initial C$^{12}$ to O$^{16}$ mass ratio. We also discuss the possible implications for understanding the observed early time bumps in light-curves. |
| title | Three-dimensional Structure of Incomplete Carbon-Oxygen Detonations in Type Ia Supernovae |
| topic | Solar and Stellar Astrophysics Plasma Physics |
| url | https://arxiv.org/abs/2501.19190 |