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- W2001936587 abstract "Carbon-oxygen white dwarfs contain neon-22 formed from alpha-captures onto nitrogen during core He burning in the progenitor star. In a white dwarf (type Ia) supernova, the neon-22 abundance determines, in part, the neutron-to-proton ratio and hence the abundance of radioactive nickel-56 that powers the lightcurve. The neon-22 abundance also changes the burning rate and hence the laminar flame speed. We tabulate the flame speedup for different initial carbon and neon-22 abundances and for a range of densities. This increase in the laminar flame speed--about 30% for a neon-22 mass fraction of 6%--affects the deflagration just after ignition near the center of the white dwarf, where the laminar speed of the flame dominates over the buoyant rise, and in regions of lower density ~ 10^7 g/cm3 where a transition to distributed burning is conjectured to occur. The increase in flame speed will decrease the density of any transition to distributed burning." @default.
- W2001936587 created "2016-06-24" @default.
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- W2001936587 date "2007-01-16" @default.
- W2001936587 modified "2023-10-17" @default.
- W2001936587 title "The Laminar Flame Speedup by 22 Ne Enrichment in White Dwarf Supernovae" @default.
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- W2001936587 doi "https://doi.org/10.1086/511856" @default.
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