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arXiv 2009.04731astro-ph.COgr-qchep-ph
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原始黑洞的成团演化

The Clustering Evolution of Primordial Black Holes

V. De Luca, V. Desjacques, G. Franciolini, A. Riotto

摘要:

原始黑洞可能构成宇宙中暗物质的重要组成部分,并负责LIGO/Virgo合作观察到的黑洞合并的引力波信号。原始黑洞的空间聚集可能会影响它们的合并率,并对它们的质量和丰度的约束产生重大影响。我们提供了一些原始的黑洞空间集群演化的分析处理,比较我们的结果与一些现有的N体数值模拟和讨论的影响黑洞合并率。如果原始黑洞对暗物质的一小部分有贡献,那么原始黑洞聚集就不相关了。另一方面,对于一个大的贡献的暗物质,我们认为,集群可能会增加后期的宇宙合并率与LIGO/室女座探测率兼容的水平。对于形成于原始时期的黑洞双星的早期宇宙合并率,成团可以克服LIGO/Virgo约束,但不能回避它们。

英文摘要:

Primordial black holes might comprise a significant fraction of the dark matter in the Universe and be responsible for the gravitational wave signals from black hole mergers observed by the LIGO/Virgo collaboration. The spatial clustering of primordial black holes might affect their merger rates and have a significant impact on the constraints on their masses and abundances. We provide some analytical treatment of the primordial black hole spatial clustering evolution, compare our results with some of the existing N-body numerical simulations and discuss the implications for the black hole merger rates. If primordial black holes contribute to a small fraction of the dark matter, primordial black hole clustering is not relevant. On the other hand, for a large contribution to the dark matter, we argue that the clustering may increase the late time Universe merger rate to a level compatible with the LIGO/Virgo detection rate. As for the early Universe merger rate of black hole binaries formed at primordial epochs, clustering alleviates the LIGO/Virgo constraints, but does not evade them.

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