标题： 引力音叉和分层三体系统 显示英文标题

标题： Gravitational tuning forks and hierarchical triple systems

摘要： 我们研究由一个位于超大质量黑洞（SMBH）附近的双星系统组成的分层三体系统在强场区域的引力波（GW）辐射。 LIGO-Virgo合作组最近报告了与此动力学起源相关的合并证据。 这些系统在星系中心很常见，因此是基于空间的LISA任务以及其他先进探测器的目标。 多普勒频移、像差、透镜效应和强烈的振幅调制是这些系统引力波信号中的特征，在我们的框架中已内置，无需使用现象学修补。 我们发现，双星可以共振激发SMBH的准正常模，如同两个频率匹配的音叉的共振激发。 当与标准的极端质量比旋进的能量通量相比时，穿过SMBH视界的能量通量可能相当显著。 因此，这些三体系统是对强场物理和致密天体黑洞性质的一个卓越探针。 显示英文摘要

摘要： We study gravitational wave (GW) emission in the strong-field regime by a hierarchical triple system composed of a binary system placed in the vicinity of a supermassive black hole (SMBH). The LIGO-Virgo collaboration recently reported evidence for coalescences with this dynamical origin. These systems are common in galactic centers and thus are a target for the space-based LISA mission as well as other advanced detectors. Doppler shifts, aberration, lensing and strong amplitude modulations are features present in the GW signal from these systems, built into our framework and with no need for phenomenological patches. We find that the binary can resonantly excite the quasinormal modes of the SMBH, as in the resonant excitation of two tuning forks with matching frequencies. The flux of energy crossing the SMBH horizon can be significant, when compared with that from standard extreme-mass-ratio inspirals. Therefore, these triple systems are an outstanding probe of strong-field physics and of the BH nature of compact objects.