自上而下紧凑物体质量计算的对不稳定性质量损失
Pair-instability mass loss for top-down compact object mass calculations
摘要：
星族合成依赖于半解析公式来确定坍缩恒星核心（氦或碳氧）中致密天体的质量。这些公式是在跨越不同爆炸机制的质量范围内结合起来的，有可能在致密物体质量分布中引入人为特征。这种人为现象削弱了对引力波观测结果的解释。我们提出了一个“自上而下”的残余质量处方，我们删除质量从每一个可能的质量损失机制的恒星，而不是依赖于回落到一个“原紧凑对象”，以获得最终的质量。对于这些质量损失的机制之一，我们适合的金属度依赖的质量损失的脉动对不稳定超新星的数值模拟。通过在没有脉冲的情况下不施加质量损失，我们的方法在低质量端恢复了现有的紧凑物体质量处方，并确保了整个核心崩溃/脉冲对不稳定制度的连续性。我们的剩余质量处方可以扩展到包括最终坍缩时的其他质量损失机制。
英文摘要：
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.
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