论文标题
矮星系中原始黑洞的分层合并
Hierarchical Merger of Primordial Black Holes in Dwarf Galaxies
论文作者
论文摘要
我们研究了原始黑洞（PBH）的合并历史，它们代表了典型矮星系核心的主要暗物质组成部分。我们研究了一系列碰撞序列的可能性，导致黑洞的分层合并，并查看此类{\ it clusters}中的最终质谱，该质谱最初呈现出单色（单质）PBH种群。我们的研究表明，合并过程导致核心总质量的约40美元的总质量转移到合并产品中，而不管PBH的初始质量如何，大约5美元的能量$ 5 \％$以引力波的形式散发出来。我们发现，在较轻的质量限制中，黑洞的巨大最多是原始种群可以在哈勃时期内形成的八倍。
We study the merger history of primordial black holes (PBHs) in a scenario where they represent the dominant dark matter component of a typical dwarf galaxies' core. We investigate the possibility of a sequence of collisions resulting in a hierarchical merger of black holes and look at the final mass spectrum in such {\it clusters}, which initially present a monochromatic (single-mass) PBH population. Our study shows that the merging process results in the transfer of about $40\%$ of the total mass of the core to the merger products regardless of the initial mass of PBHs, with about $5\%$ of energy radiated out in the form of gravitational waves. We find that, in the lighter mass limit, black holes up to eight times more massive than the original population can be formed within a Hubble time.
