Comparing remnant properties from horizon data and asymptotic data in numerical relativity
Comparing remnant properties from horizon data and asymptotic data in numerical relativity
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DOI：
10.1103/physrevd.103.124029
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发表时间：
2021-04
影响因子：
5
通讯作者：
D. Iozzo;N. Khera;L. Stein;Keefe Mitman;M. Boyle;N. Deppe;F. Hébert;Lawrence E. Kidder;Jordan Moxon;H. Pfeiffer;M. Scheel;S. Teukolsky;William Throwe
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作者：
D. Iozzo;N. Khera;L. Stein;Keefe Mitman;M. Boyle;N. Deppe;F. Hébert;Lawrence E. Kidder;Jordan Moxon;H. Pfeiffer;M. Scheel;S. Teukolsky;William Throwe
我们提出了一项新的研究，研究了13个二元黑洞系统的残余黑洞特性，使用谱爱因斯坦代码进行了数值演化。利用SpECTRE的柯西特征演化，从视界数据准局域确定了每个残体的质量、自旋和反作用速度，并从Bondi数据$(h, \psi_4, \psi_3, \psi_2, \psi_1)$渐近地计算了未来零无穷远时的质量、自旋和反作用速度。我们比较了这些独立的残体和时空边界残体性质的测量结果，从而深入了解了在数值相对论中，渐近数据如何能够很好地再现残体黑洞的局部性质。我们还讨论了将视界量与渐近量联系起来的理论框架，以及它与我们的结果的关系。本研究建议对模拟极端时空波形目录中报告的后坐力速度进行简单改进，为未来的替代残余模型提供改进，并为评估数值模拟的物理精度提供新的分析技术。
We present a new study of remnant black hole properties from 13 binary black hole systems, numerically evolved using the Spectral Einstein Code. The mass, spin, and recoil velocity of each remnant were determined quasi-locally from apparent horizon data and asymptotically from Bondi data $(h, \psi_4, \psi_3, \psi_2, \psi_1)$ computed at future null infinity using SpECTRE's Cauchy characteristic evolution. We compare these independent measurements of the remnant properties in the bulk and on the boundary of the spacetime, giving insight into how well asymptotic data are able to reproduce local properties of the remnant black hole in numerical relativity. We also discuss the theoretical framework for connecting horizon quantities to asymptotic quantities and how it relates to our results. This study recommends a simple improvement to the recoil velocities reported in the Simulating eXtreme Spacetimes waveform catalog, provides an improvement to future surrogate remnant models, and offers new analysis techniques for evaluating the physical accuracy of numerical simulations.