Spiral instability can drive thermonuclear explosions in binary white dwarf mergers
Thermonuclear, or Type Ia supernovae (SNe Ia), originate from the explosion of carbon-oxygen white dwarfs, and serve as standardizable cosmological candles. However, despite their importance, the nature of the progenitor systems that give rise to SNe Ia has not been hitherto elucidated. Observationa...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/28120 |
| Acceso en línea: | https://hdl.handle.net/2117/28120 https://dx.doi.org/10.1088/2041-8205/800/1/L7 |
| Access Level: | acceso abierto |
| Palabra clave: | Hydrodyanamics White dwarf stars Supernovae hydrodynamics supernovae: general white dwarfs ECCENTRIC GRAVITATIONAL INSTABILITIES IA SUPERNOVAE COLLISIONS DETONATIONS SIMULATIONS PROGENITORS EVOLUTION REMNANTS DISKS END Estels nans Supernoves Àrees temàtiques de la UPC::Física::Astronomia i astrofísica |
| Sumario: | Thermonuclear, or Type Ia supernovae (SNe Ia), originate from the explosion of carbon-oxygen white dwarfs, and serve as standardizable cosmological candles. However, despite their importance, the nature of the progenitor systems that give rise to SNe Ia has not been hitherto elucidated. Observational evidence favors the double-degenerate channel in which merging white dwarf binaries lead to SNe Ia. Furthermore, significant discrepancies exist between observations and theory, and to date, there has been no self-consistent merger model that yields a SNe Ia. Here we show that a spiral mode instability in the accretion disk formed during a binary white dwarf merger leads to a detonation on a dynamical timescale. This mechanism sheds light on how white dwarf mergers may frequently yield SNe Ia. |
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