标题： 是什么触发了一型超新星：原初黑洞的即时爆炸还是伴星？ 显示英文标题

标题： What triggers type Ia supernovae: Prompt detonations from primordial black holes or companion stars?

摘要： 我们建立了暗物质以原始黑洞（PBH）形式存在的小行星质量大小与白矮星碰撞的速率模拟。 这些碰撞会触发快速点火，并可能是解开Ia型超新星点火之谜的关键。 我们的框架足够灵活，可以涵盖前身白矮星质量、宿主星系恒星质量、星系中心径向偏移以及宇宙时间的全范围。 速率分布模式与文献中对稍作扩展的对数正态PBH质量谱的观测确定一致。 最引人注目的是，亮度分布得以自然得出，无需微调。 我们未发现严重矛盾，除了推测的PBH质量尺度无法从第一性原理预测之外。 显示英文摘要

摘要： We set up and perform collision rate simulations between dark matter in the form of asteroid-mass primordial black holes (PBHs) and white dwarf stars. These encounters trigger prompt detonations and could be the key to solving the ignition mystery of type Ia supernovae. Our framework is flexible enough to cover the full range of progenitor white dwarf masses, host galaxy stellar masses, galactocentric radial offsets, and cosmic time. The rate distribution pattern is consistent with exhaustive literature observational determinations for a slightly extended log-normal PBH mass spectrum. Most strikingly, the so far unexplained brightness distribution comes out without finetuning. We find no severe contradictions, except that the inferred PBH mass scale is unpredicted from first principles.