标题： 原始双黑洞合并具有对数正态质量谱 显示英文标题

标题： Coalescing primordial binary black holes with log-normal mass spectrum

摘要： 早期宇宙中产生的原始黑洞可以构成暗物质的很大一部分，并成为早期星系形成的种子。质量约为几十倍太阳质量的双颗原始黑洞可以解释观测到的LIGO/Virgo引力波事件。在这封信中，我们展示了具有以$M_0\simeq 15-17 M_\odot$为中心的对数正态质量谱的原始黑洞同时解释了被LIGO/Virgo探测到的双黑洞合并系统的啁啾质量分布以及根据LIGO/Virgo观测推断出的合并系统啁啾质量分布。得到的原始黑洞对数正态质量谱参数还给出了在$z=6-7$处解释观测到的超大质量黑洞群体所需的$M\gtrsim 10^4 M_\odot$种子的比例。 显示英文摘要

摘要： Primordial black holes created in the early Universe can constitute a substantial fraction of dark matter and serve as seeds for early galaxy formation. Binary primordial black holes with masses of the order of a few dozen solar masses can explain the observed LIGO/Virgo gravitational-wave events. In this Letter, we show that primordial black holes with log-normal mass spectrum centered at $M_0\simeq 15-17 M_\odot$ simultaneously explain both the chirp mass distribution of the detected LIGO/Virgo binary black holes and the differential chirp mass distribution of merging binaries as inferred from the LIGO/Virgo observations. The obtained parameters of log-normal mass spectrum of primordial black holes also give the fraction of seeds with $M\gtrsim 10^4 M_\odot$ required to explain the observed population of supermassive black holes at $z=6-7$.