Spatial clustering of primordial black holes
Spatial clustering of primordial black holes
复制标题
原初黑洞的空间聚集
DOI：
10.1103/physrevd.98.123533
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发表时间：
2018
影响因子：
5
通讯作者：
A. Riotto
中科院分区：
文献类型：
--
作者：
V. Desjacques;A. Riotto
原始黑洞（PBH）是暗物质（或其一部分）的可能性最近引起了人们的广泛关注。它们的空间聚集是一个基本性质，它决定了在给定的质量范围内是否可以避开当前的观测约束，合并是否重要以及原始黑洞是否可以产生宇宙学结构。我们把它们作为离散的对象，并澄清其空间聚类的问题，重点是短程排斥及其对大尺度功率谱的影响。即使泊松自对项总是出现在零滞后相关中，这并不一定意味着原始黑洞最初是泊松分布的。然而，虽然最初的PBH集群取决于小尺度功率谱的详细形状，我们认为，它是不相关的一个狭窄的光谱特征和原始黑洞质量仍然允许的观测。
The possibility that primordial black holes (PBHs) are the dark matter (or a fraction thereof) has attracted much attention recently. Their spatial clustering is a fundamental property which determines, among others, whether current observational constraints are evaded within a given mass range, whether merging is significant and whether primordial black holes could generate cosmological structure. We treat them as discrete objects and clarify the issue of their spatial clustering, with an emphasis on short-range exclusion and its impact on their large scale power spectrum. Even if a Poissonian self-pair term is always present in the zero-lag correlation, this does not necessarily imply that primordial black holes are initially Poisson distributed. However, while the initial PBH clustering depends on the detailed shape of the small-scale power spectrum, we argue that it is not relevant for a narrow spectral feature and primordial black hole masses still allowed by observations.