论文标题
层状火焰速度在退化的氧气混合物中
Laminar Flame Speeds in Degenerate Oxygen-Neon Mixtures
论文作者
论文摘要
退化氧核心核的崩溃（即电子捕获超新星或增生诱导的塌陷）通过一个阶段进行，在该阶段中，在中心或附近形成了deflagration波（“火焰”）并通过恒星传播。在模型中，该火焰的假定速度会影响该过程是否导致爆炸或中子星的形成。我们通过详细的恒星进化模型动机，计算退化氧蛋白混合物中的层状火焰速度。这些混合物包括痕量的碳和比以前工作中考虑的碳分数低。我们发现，微量碳对火焰速度的影响很小，但是具有电子分数$ y_e \ y_e \ 0.48-0.49 $的材料的层状火焰速度比$ y_e = 0.5 $快2美元。我们提供了表格的火焰速度和相应的拟合功能，因此可以通过崩溃过程的全恒星流体动力学模拟来评估这种差异的影响。
The collapse of degenerate oxygen-neon cores (i.e., electron-capture supernovae or accretion-induced collapse) proceeds through a phase in which a deflagration wave ("flame") forms at or near the center and propagates through the star. In models, the assumed speed of this flame influences whether this process leads to an explosion or to the formation of a neutron star. We calculate the laminar flame speeds in degenerate oxygen-neon mixtures with compositions motivated by detailed stellar evolution models. These mixtures include trace amounts of carbon and have a lower electron fraction than those considered in previous work. We find that trace carbon has little effect on the flame speeds, but that material with electron fraction $Y_e \approx 0.48-0.49$ has laminar flame speeds that are $\approx 2$ times faster than those at $Y_e = 0.5$. We provide tabulated flame speeds and a corresponding fitting function so that the impact of this difference can be assessed via full star hydrodynamical simulations of the collapse process.
