Thermonuclear explosions as Type II supernovae
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909077199650816 |
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| author | Kozyreva, Alexandra Moran-Fraile, Javier Holas, Alexander Bronner, Vincent A. Roepke, Friedrich K. Pavlyuk, Nikolay Mironov, Alexey Tsvetkov, Dmitriy |
| author_facet | Kozyreva, Alexandra Moran-Fraile, Javier Holas, Alexander Bronner, Vincent A. Roepke, Friedrich K. Pavlyuk, Nikolay Mironov, Alexey Tsvetkov, Dmitriy |
| contents | We consider a binary stellar system, in which a low-mass, of 0.6 Msun, carbon-oxygen white dwarf (WD) mergers with a degenerate helium core of 0.4 Msun of a red giant. We analyse the outcome of a merger within a common envelope (CE). We predict the observational properties of the resulting transient. We find that the double detonation of the WD, being a pure thermonuclear explosion and embedded into the hydrogen-rich CE, has a light curve with the distinct plateau shape, i.e. looks like a supernova (SN) Type IIP, with a duration of about 40 days. We find five observed SNe IIP: SN 2004dy, SN 2005af, SN 2005hd, SN 2007aa, and SN 2008bu, that match the V-band light curve of our models. Hence, we show that a thermonuclear explosion within a CE might be mistakenly identified as a SN IIP, which are believed to be an outcome of a core-collapse neutrino-driven explosion of a massive star. We discuss a number of diagnostics, that may help to distinguish this kind of a thermonuclear explosion from a core-collapse SN. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10401 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Thermonuclear explosions as Type II supernovae Kozyreva, Alexandra Moran-Fraile, Javier Holas, Alexander Bronner, Vincent A. Roepke, Friedrich K. Pavlyuk, Nikolay Mironov, Alexey Tsvetkov, Dmitriy Solar and Stellar Astrophysics High Energy Astrophysical Phenomena We consider a binary stellar system, in which a low-mass, of 0.6 Msun, carbon-oxygen white dwarf (WD) mergers with a degenerate helium core of 0.4 Msun of a red giant. We analyse the outcome of a merger within a common envelope (CE). We predict the observational properties of the resulting transient. We find that the double detonation of the WD, being a pure thermonuclear explosion and embedded into the hydrogen-rich CE, has a light curve with the distinct plateau shape, i.e. looks like a supernova (SN) Type IIP, with a duration of about 40 days. We find five observed SNe IIP: SN 2004dy, SN 2005af, SN 2005hd, SN 2007aa, and SN 2008bu, that match the V-band light curve of our models. Hence, we show that a thermonuclear explosion within a CE might be mistakenly identified as a SN IIP, which are believed to be an outcome of a core-collapse neutrino-driven explosion of a massive star. We discuss a number of diagnostics, that may help to distinguish this kind of a thermonuclear explosion from a core-collapse SN. |
| title | Thermonuclear explosions as Type II supernovae |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.10401 |