Dynamical evolution of quasicircular binary black hole data
Dynamical evolution of quasicircular binary black hole data
复制标题
准圆双黑洞数据的动力学演化
DOI：
10.1103/physrevd.72.044004
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发表时间：
2004
影响因子：
5
通讯作者：
J. Thornburg
中科院分区：
文献类型：
--
作者：
M. Alcubierre;B. Bruegmann;P. Diener;F. S. Guzmán;I. Hawke;Scott H. Hawley;F. Herrmann;M. Koppitz;D. Pollney;E. Seidel;J. Thornburg
我们研究双黑洞数据的完全非线性动力学演化，其轨道参数通过确定准圆轨道的有效势方法指定。研究的案例范围从库克-鲍姆加特最内层稳定圆形轨道 (ISCO) 到显着超出该间隔的情况。在所有情况下，我们都发现黑洞在不到一半的轨道周期内合并（由共同视视界的出现决定）。数值模拟的结果表明，最初的孔实际上并不在准圆形轨道上，但它们实际上几乎是一起坠落的。研究最终视界的动力学以确定最终黑洞的物理参数，例如其自旋、质量和振荡频率，从而揭示有关吸气过程的信息。我们表明，从合并过程中形成的最终黑洞中提取准确的物理信息需要相当大的分辨率，并且最终黑洞的准正规模式在合并过程中被强烈激发。对于 ISCO 情况，通过将最终形成的黑洞的物理测量值与初始数据进行比较，我们估计在合并过程中辐射出的总能量不到 3%。
We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasicircular orbits. The cases studied range from the Cook-Baumgarte innermost stable circular orbit (ISCO) to significantly beyond that separation. In all cases we find the black holes to coalesce (as determined by the appearance of a common apparent horizon) in less than half an orbital period. The results of the numerical simulations indicate that the initial holes are not actually in quasicircular orbits, but that they are in fact nearly plunging together. The dynamics of the final horizon are studied to determine physical parameters of the final black hole, such as its spin, mass, and oscillation frequency, revealing information about the inspiral process. We show that considerable resolution is required to extract accurate physical information from the final black hole formed in the merger process, and that the quasinormal modes of the final hole are strongly excited in the merger process. For the ISCO case, by comparing physical measurements of the final black hole formed to the initial data, we estimate that less than 3% of the total energy is radiated in the merger process.