论文标题
限制GWTC-3的原始黑洞二进制二进制的合并历史
Constraining the Merger History of Primordial-Black-Hole Binaries from GWTC-3
论文作者
论文摘要
原始黑洞（PBHS）不仅可以是候选冷暗物质，而且可以是Ligo-Virgo-Kagra（LVK）合作观察到的二进制黑洞的祖细胞。如果发生多合并过程，则可以将PBH质量转移到重分布。在这项工作中，我们使用第三个重力波瞬态目录（GWTC-3）的重力波事件来限制PBH二进制文件的合并历史。考虑到四种常用的PBH质量函数，即对数正态，幂律，损坏的幂律和临界崩溃形式，我们发现多合并过程对总合并率产生了亚基的贡献。因此，在估计PBH二进制文件的合并率时，可以安全地忽略合并历史的影响。我们还发现，GWTC-3最好由四个PBH质量函数的对数正态形式拟合，并确认恒星质量的PBH不能主导冷暗物质。
Primordial black holes (PBHs) can be not only cold dark matter candidates but also progenitors of binary black holes observed by LIGO-Virgo-KAGRA (LVK) Collaboration. The PBH mass can be shifted to the heavy distribution if multi-merger processes occur. In this work, we constrain the merger history of PBH binaries using the gravitational wave events from the third Gravitational-Wave Transient Catalog (GWTC-3). Considering four commonly used PBH mass functions, namely the log-normal, power-law, broken power-law, and critical collapse forms, we find that the multi-merger processes make a subdominant contribution to the total merger rate. Therefore, the effect of merger history can be safely ignored when estimating the merger rate of PBH binaries. We also find that GWTC-3 is best fitted by the log-normal form among the four PBH mass functions and confirm that the stellar-mass PBHs cannot dominate cold dark matter.
