论文标题
GW190521质量间隙事件和原始黑洞方案
The GW190521 Mass Gap Event and the Primordial Black Hole Scenario
论文作者
论文摘要
Ligo/处女座的合作最近观察到GW190521，这是第一个二进制黑洞合并，至少是成对稳定超新星理论预测的质量间隙中的主要成分质量。该观察结果不掩盖较重的黑洞的标准恒星形成场景，激发了替代假设。我们表明，如果PBH在宇宙学过程中不吸收，则无法在原始黑洞（PBH）场景中解释GW190521，因为这将需要丰富的丰度，而这已经处于紧张状态，并具有当前限制。另一方面，如果PBHS在电离时期有效地增生，GW190521可能具有原始起源。
The LIGO/Virgo Collaboration has recently observed GW190521, the first binary black hole merger with at least the primary component mass in the mass gap predicted by the pair-instability supernova theory. This observation disfavors the standard stellar-origin formation scenario for the heavier black hole, motivating alternative hypotheses. We show that GW190521 cannot be explained within the Primordial Black Hole (PBH) scenario if PBHs do not accrete during their cosmological evolution, since this would require an abundance which is already in tension with current constraints. On the other hand, GW190521 may have a primordial origin if PBHs accrete efficiently before the reionization epoch.
