Numerical investigation of the threshold for primordial black hole formation
Numerical investigation of the threshold for primordial black hole formation
复制标题
原初黑洞形成阈值的数值研究
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Niemeyer
中科院分区：
文献类型：
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作者：
J. Niemeyer
第一个结果的原始黑洞形成的辐射占主导地位的早期宇宙阶段的数值调查。模拟遵循的引力坍缩的三个不同的家庭的高振幅密度波动施加在视界交叉的时间。黑洞形成的阈值，\delta_{c} \约为0.7，被发现是几乎相同的所有微扰家庭，如果控制参数，\delta，被选为初始视界体积内的总过剩质量。此外，我们证明了黑洞质量与形成阈值的距离的缩放，已知发生在近临界引力坍缩，适用于原始黑洞的形成。
First results of a numerical investigation of primordial black hole formation in the radiation dominated phase of the Early Universe are presented. The simulations follow the gravitational collapse of three different families of high-amplitude density fluctuations imposed at the time of horizon crossing. The threshold for black hole formation, \delta_{c} \approx 0.7, is found to be nearly identical for all perturbation families if the control parameter, \delta, is chosen as the total excess mass within the initial horizon volume. Furthermore, we demonstrate that the scaling of black hole mass with distance from the formation threshold, known to occur in near-critical gravitational collapse, applies to primordial black hole formation.