论文标题
自上而下的物体质量计算的配对不稳定质量损失
Pair-instability mass loss for top-down compact object mass calculations
论文作者
论文摘要
种群合成依赖于半分析公式来确定倒塌恒星（氦或碳氧）核心的紧凑物体的质量。这种公式是在跨越不同爆炸机制的质量范围内组合的，有可能在紧凑的物体质量分布中引入人造特征。这种伪影损害了重力波观测的解释。我们提出了一个“自上而下”的残留质量处方，在该处方中，我们从恒星中清除了每个可能的质量损失机制，而不是依靠后返回到“ proto-compact-object”以获得最终的质量。对于这些质量损失机制之一，我们符合金属性依赖性质量，从数值模拟中损失了脉冲对不稳定性超新星。通过在没有脉冲的情况下不施加质量损失，我们的方法可以在低质量端处恢复现有的紧凑物体质量处方，并确保在核心偏转/脉冲对稳定性方面的连续性。我们的残留质量处方可以扩展，以在最后崩溃时包括其他质量损失机制。
Population synthesis relies on semi-analytic formulae to determine masses of compact objects from the (helium or carbon-oxygen) cores of collapsing stars. Such formulae are combined across mass ranges that span different explosion mechanisms, potentially introducing artificial features in the compact object mass distribution. Such artifacts impair the interpretation of gravitational-wave observations. We propose a "top-down" remnant mass prescription where we remove mass from the star for each possible mass-loss mechanism, instead of relying on the fallback onto a "proto-compact-object" to get the final mass. For one of these mass-loss mechanisms, we fit the metallicity-dependent mass lost to pulsational-pair instability supernovae from numerical simulations. By imposing no mass loss in the absence of pulses, our approach recovers the existing compact object masses prescription at the low mass end and ensures continuity across the core-collapse/pulsational-pair-instability regime. Our remnant mass prescription can be extended to include other mass-loss mechanisms at the final collapse.
