标题： 白矮星超新星中氖-22 enrichment 对层流火焰速度的影响 显示英文标题

标题： The Laminar Flame Speedup by Neon-22 Enrichment in White Dwarf Supernovae

摘要： 碳氧白矮星中含有从氮上α俘获形成的氖-22，这是来自前身恒星核心氦燃烧的结果。 在白矮星（Ia型）超新星中，氖-22的丰度部分决定了中子与质子的比例，从而影响了由放射性镍-56提供的光变曲线的丰度。 氖-22的丰度还改变了燃烧速率，因此也影响了层流火焰速度。 我们列出了不同初始碳和氖-22丰度以及不同密度范围下的火焰速度增加情况。 层流火焰速度的这种增加——对于氖-22质量分数为6%时大约为30%——会影响白矮星中心点燃后火焰靠近中心处的爆燃，此时层流火焰速度主导浮力上升，并且在较低密度（约10^7克/厘米³）区域中，据推测会发生向分布式燃烧的转变。 火焰速度的增加会降低任何向分布式燃烧转变的密度。 显示英文摘要

摘要： 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.