标题： 广义相对论对核心坍缩超新星的影响 显示英文标题

标题： The Effects of General Relativity on Core Collapse Supernovae

摘要： 广义相对论（GR）对核心坍缩超新星关键冲击再加热阶段的流体力学和中微子输运的影响进行了研究。 我们发现，使用广义相对论流体力学计算的核心坍缩结果，在冲击波范围内形成了更加致密的核心结构，冲击波在停滞时的半径减少了两倍。 冲击波后方物质的流入速度在整个演化过程中也增加了两倍。 我们开发了一个用于静态时空中的广义相对论多组通量限制扩散（MGFLD）的代码，并将后反弹模型选定时间切片的稳态中微子分布与使用牛顿MGFLD计算的结果进行了比较。 GR输运计算显示，由于红移和曲率效应，中微子光度和均方根能量出现了预期的减少。 尽管GR对流体力学和中微子输运的影响似乎不利于冲击波恢复，但核心配置差异足够大，除了使用牛顿流体力学和输运模拟核心坍缩超新星并不现实外，无法得出任何明确的结论。 显示英文摘要

摘要： The effects of general relativity (GR) on the hydrodynamics and neutrino transport are examined during the critical shock reheating phase of core collapse supernovae. We find that core collapse computed with GR hydrodynamics results in a substantially more compact core structure out to the shock, the shock radius at stagnation being reduced by a factor of 2. The inflow speed of material behind the shock is also increased by a factor of 2 throughout most of the evolution. We have developed a code for general relativistic multigroup flux-limited diffusion (MGFLD) in static spacetimes and compared the steady-state neutrino distributions for selected time slices of post-bounce models with those computed with Newtonian MGFLD. The GR transport calculations show the expected reductions in neutrino luminosities and rms energies from redshift and curvature effects. Although the effects of GR on the hydrodynamics and neutrino transport seem to work against shock revival, the core configurations are sufficiently different that no firm conclusions can be drawn, except that simulations of core collapse supernovae using Newtonian hydrodynamics and transport are not realistic.