Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada.
University of Guelph, Guelph, Ontario N2L 3G1, Canada.
Phys Rev Lett. 2019 Sep 6;123(10):101103. doi: 10.1103/PhysRevLett.123.101103.
We describe a new class of resonances for extreme mass-ratio inspirals (EMRIs): tidal resonances, induced by the tidal field of nearby stars or stellar-mass black holes. A tidal resonance can be viewed as a general relativistic extension of the Kozai-Lidov resonances in Newtonian systems and is distinct from the transient resonance already known for EMRI systems. Tidal resonances will generically occur for EMRIs. By probing their influence on the phase of an EMRI waveform, we can learn about the tidal environmental of the EMRI system, albeit at the cost of a more complicated waveform model. Observations by the Laser Interferometer Space Antenna of EMRI systems therefore have the potential to provide information about the distribution of stellar-mass objects near their host galactic-center black holes.
我们描述了一类新的极端质量比进动（EMRI）共振：潮汐共振，由附近恒星或恒星质量黑洞的潮汐场引起。潮汐共振可以看作是牛顿体系中Kozai-Lidov 共振的广义相对论延伸，与 EMRI 体系中已经知道的瞬变共振不同。潮汐共振通常会出现在 EMRI 中。通过探测它们对 EMRI 波形相位的影响，我们可以了解 EMRI 系统的潮汐环境，但代价是更复杂的波形模型。因此，激光干涉空间天线对 EMRI 系统的观测有可能提供有关其宿主星系中心黑洞附近恒星质量物体分布的信息。
