论文标题
关于宇宙空隙中原始黑洞的合并速率
On the Merger Rate of Primordial Black Holes in Cosmic Voids
论文作者
论文摘要
宇宙空隙被称为宇宙网络的不足子结构，覆盖了大量宇宙。众所周知，宇宙空隙中包含少量的暗物质光环，因此在宇宙的这些僻静区域中存在原始黑洞（PBH）的存在并非不太可能。在这项工作中，我们计算了在宇宙空隙中构成的暗光晕中PBHS的合并速率，并确定它们对由高级激光干涉仪重力仪重力波动仪（Aligo） - Advanced Virgo（Avirgo）检测器记录的黑洞合并引起的重力波事件的贡献。依靠PBH方案，我们的分析结果表明，在Aligo-Avirgo检测器记录的所有记录的二进制黑洞合并中，大约$ 2 \ sim 3 $年度事件应属于宇宙空隙。我们还计算了宇宙空隙中PBHS合并速率的红移演变。结果表明，PBHS合并速率的演变对红移变化具有最小的敏感性，这在考虑宇宙空隙的演变时似乎是合理的。最后，我们指定了PBHS合并速率的行为与宇宙空隙中其质量和分数的函数，并估计$ \ MATHCAL {R}（M_ {PBH}，F_ {PBH}）$关系，这与我们的发现非常兼容。
Cosmic voids are known as underdense substructures of the cosmic web that cover a large volume of the Universe. It is known that cosmic voids contain a small number of dark matter halos, so the existence of primordial black holes (PBHs) in these secluded regions of the Universe is not unlikely. In this work, we calculate the merger rate of PBHs in dark matter halos structured in cosmic voids and determine their contribution to gravitational wave events resulting from black hole mergers recorded by the Advanced Laser Interferometer Gravitational-Wave Observatory (aLIGO)-Advanced Virgo (aVirgo) detectors. Relying on the PBH scenario, the results of our analysis indicate that about $2 \sim 3$ annual events of binary black hole mergers out of all those recorded by the aLIGO-aVirgo detectors should belong to cosmic voids. We also calculate the redshift evolution of the merger rate of PBHs in cosmic voids. The results show that the evolution of the merger rate of PBHs has minimum sensitivity to the redshift changes, which seems reasonable while considering the evolution of cosmic voids. Finally, we specify the behavior of the merger rate of PBHs as a function of their mass and fraction in cosmic voids and we estimate $\mathcal{R} (M_{PBH}, f_{PBH})$ relation, which is well compatible with our findings.
