论文标题
Brans-Dicke理论中原始黑洞的形成和聚类
Formation and clustering of primordial black holes in Brans-Dicke theory
论文作者
论文摘要
研究了Brans-Dicke标量调整的重力理论中早期宇宙中原始黑洞的形成。发现对密度扰动的阈值的校正。在阈值之上，重力崩溃发生在宇宙学跨越。校正以某种方式取决于不断发展的标量字段。它们会影响原始黑洞形成的概率，如果标量场不均匀，则可能导致大尺度的聚类。簇的形成又增加了黑洞合并的概率和相应的重力波爆发速率。如果观察到的部分事件与原始黑洞有关，则簇可以为Ligo/处女座重力波事件提供重要贡献。
The formation of primordial black holes in the early universe in the Brans-Dicke scalar-tensor theory of gravity is investigated. Corrections to the threshold value of density perturbations are found. Above the threshold, the gravitational collapse occurs after the cosmological horizon crossing. The corrections depend in a certain way on the evolving scalar field. They affect the probability of primordial black holes formation, and can lead to their clustering at large scales if the scalar field is inhomogeneous. The formation of the clusters, in turn, increases the probability of black holes merge and the corresponding rate of gravitational wave bursts. The clusters can provide a significant contribution to the LIGO/Virgo gravitational wave events, if part of the observed events are associated with primordial black holes.
