论文标题
在二进制式孔模拟中，在公共地平线上的多极力矩
Multipole moments on the common horizon in a binary-black-hole simulation
论文作者
论文摘要
我们在相等的质量，非旋转，准圆形二进制黑洞系统的共同范围内构建了协变量的多极矩。我们看到这些多极矩与重力波形之间存在很强的相关性。我们发现，在足够晚期的基本准模式中，多极矩得到很好的描述。对于每个多极点，在最佳模型中至少可以检测到不同$ \ ell $的两个基本模式。这些模型提供了对残余黑洞的真实质量和旋转的忠实估计。我们还表明，通过包括泛音，$ \ ell = m = 2 $质量多极点在合并后始终允许出色的准模式描述。这表明了合并附近的扰动理论的令人惊讶的力量。
We construct the covariantly defined multipole moments on the common horizon of an equal-mass, non-spinning, quasicircular binary-black-hole system. We see a strong correlation between these multipole moments and the gravitational waveform. We find that the multipole moments are well described by the fundamental quasinormal modes at sufficiently late times. For each multipole moment, at least two fundamental modes of different $\ell$ are detectable in the best model. These models provide faithful estimates of the true mass and spin of the remnant black hole. We also show that by including overtones, the $\ell=m=2$ mass multipole moment admits an excellent quasinormal-mode description at all times after the merger. This demonstrates the perhaps surprising power of perturbation theory near the merger.
