Turbulent Mixing on Helium-Accreting White Dwarfs

摘要: An attractive scenario for producing Type Ia supernovae (SNe Ia) is a double detonation, where detonation of an accreted helium layer triggers ignition C/O core. Whether or not such mechanism can explain some most SNe depends on the properties burning, which in turn set by composition surface material. Using combination semi-analytic and simple numerical models, I explore when turbulent mixing due to hydrodynamic instabilities during accretion process mix core material up into helium. Mixing strongest at high rates, large white dwarf (WD) masses, slow spin rates. The would result subsequent burning that better matches observed Ia. In cases, there considerable lead more than 50% time ignition. These results will hopefully motivate future theoretical studies strongly mixed conditions. also has implications other types WD explosions, including so-called .Ia supernovae, calcium-rich transients (if they arise from accreting WDs), metal-enriched classical novae.