论文标题
早期宇宙中带有原始黑洞的暗物质模拟
Dark Matter Simulations with Primordial Black Holes in the Early Universe
论文作者
论文摘要
已经提出了$ 10-30 m_ \ odot $的原始黑洞（PBH），作为对Ligo天文台最近发现的引力波排放事件的可能解释。如果是真的，那么PBHS将构成宇宙中暗物质成分的相当一部分。使用一系列宇宙学n体模拟，包括暗物质和可变的PBH，范围从$ f_ {pbh} = 10^{ - 4} $到$ f_ {pbh} = 1 $，我们分析了形成的过程，并分析了pbh pbh pbh pbh pbh pairs的进程，以及不断限制的事件，以及不及格的概述，以及杂物的融合，以及 - 杂物的杂物，以及 - 杂物的范围，以及 - 概述的 - - 概述 - 均已构成 - 概述 - 均已构成 - - 概述 - 均可构成和估计的 - - 概述 - 均已构成和估计的 - - 概述 - 均已构成和估计的 - - 概述 - 均已构成和估算的 - 均已构成和估算。我们表明，它们与Ligo和其他研究小组获得的PBH丰度的约束非常吻合。我们发现，对合并率负责的主要因素，对稳定性受到暗物质光环形成和聚类的影响的影响。作为一方面的结果，我们还评估了数值误差在结合对的稳定性中的影响，这对于使用此方法的将来的研究很有用。
Primordial Black Holes (PBH) with masses of order $10-30 M_\odot$ have been proposed as a possible explanation of the gravitational waves emission events recently discovered by the LIGO observatory. If true, then PBHs would constitute a sizeable fraction of the dark matter component in the Universe. Using a series of cosmological N-body simulations which include both dark matter and a variable fraction of PBHs ranging from $f_{PBH} = 10^{-4}$ to $f_{PBH} = 1$, we analyse the processes of formation and disruption of gravitationally bound PBH pairs, as well as the merging of both bound and unbound pairs, and estimate the probabilities of such events. We show that they are in good agreement with the constrains to the PBH abundance obtained by the LIGO and other research groups. We find that pair stability, while being a main factor responsible for the merger rate, is significantly affected by the effects of dark matter halo formation and clustering. As a side result, we also evaluate the effects of numerical errors in the stability of bound pairs, which can be useful for future research using this methodology.
