Gravitational waves from hierarchical triple systems with Kozai-Lidov oscillation
Gravitational waves from hierarchical triple systems with Kozai-Lidov oscillation
复制标题
DOI：
10.1103/physrevd.101.104053
复制
发表时间：
2019-11
影响因子：
5
通讯作者：
Priti Gupta;Haruka Suzuki;Hirotada Okawa;K. Maeda
中科院分区：
文献类型：
--
作者：
Priti Gupta;Haruka Suzuki;Hirotada Okawa;K. Maeda
我们研究从分层三体系统到一阶后牛顿近似的引力波。在某些条件下，附近第三天体的存在会导致内部双星的偏心率和相对倾角之间的周期性交换，称为科扎伊-利多夫振荡。我们分析了经历这种振荡的内部双星系统的波形特征。我们发现，在引力波形和能谱中可以观察到由第三伴星引起的变化，这应该与孤立双星和共面三体系统的变化进行比较。未来天基干涉仪的探测将使研究兆赫范围内的引力波谱成为可能，并可能通过所寻址的源获取信号。
We study gravitational waves from a hierarchical three-body system up to first-order post-Newtonian approximation. Under certain conditions, the existence of a nearby third body can cause periodic exchange between eccentricity of an inner binary and relative inclination, known as Kozai-Lidov oscillations. We analyze features of the waveform from the inner binary system undergoing such oscillations. We find that variation caused due to the tertiary companion can be observed in the gravitational waveforms and energy spectra, which should be compared with those from isolated binaries and coplanar three-body system. The detections from future space-based interferometers will make possible the investigation of gravitational wave spectrum in mHz range and may fetch signals by sources addressed.