论文标题

在旋转的超级质量黑洞附近合并紧凑型二进制文件:偏心性激发由于Apsidal prepession共振引起的

Merging Compact Binaries Near a Rotating Supermassive Black Hole: Eccentricity Excitation due to Apsidal Precession Resonance

论文作者

Liu, Bin, Lai, Dong

论文摘要

我们研究在分层三构型中旋转超级质量黑洞(SMBH)附近合并紧凑型二进制文件的动力学。我们包括各种一般的相对论效应,这些效应将内部轨道,外轨道和SMBH的自旋旋转。在由于重力辐射引起的轨道衰减过程中,内部二进制会遇到“ apsidal promession共振”并体验偏心兴奋。当内部二进制的APSidal进动速率与外部二进制的倍率匹配时,这种共振发生在牛顿相互作用和各种牛顿后效应所驱动的前进时。偏心率激发要求外轨道具有有限的偏心率,并且对于具有较小的相互倾斜的三元组最有效,与研究良好的利多夫 - 科扎伊效应相反。在低频带中二进制发射引力波时,可能发生共振和相关的偏心率生长,并且可以通过未来的空间引力检测器检测到。

We study the dynamics of merging compact binaries near a rotating supermassive black hole (SMBH) in a hierarchical triple configuration. We include various general relativistic effects that couple the inner orbit, the outer orbit and the spin of the SMBH. During the orbital decay due to gravitational radiation, the inner binary can encounter an "apsidal precession resonance" and experience eccentricity excitation. This resonance occurs when the apsidal precession rate of the inner binary matches that of the outer binary, with the precessions driven by both Newtonian interactions and various post-Newtonian effects. The eccentricity excitation requires the outer orbit to have a finite eccentricity, and is most effective for triples with small mutual inclinations, in contrast to the well-studied Lidov-Kozai effect. The resonance and the associated eccentricity growth may occur while the binary emits gravitational waves in the low-frequency band, and may be detectable by future space-based gravitational wave detectors.

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