小质量比极限下并合-铃宕波形的剖析
Dissection of a merger-ringdown waveform in the small-mass-ratio limit
- Radboud University(拉德堡德大学)
- University of Southampton(南安普顿大学)
- Universität Leipzig(莱比锡大学)
- Scoil na Matamaitice agus na Staitisticí, An Coláiste Ollscoile, Baile Átha Cliath(都柏林三一学院数学与统计学院)
- Centro Brasileiro de Pesquisas Físicas (CBPF)(巴西物理研究中心)
机构由 AI 辅助整理,请以论文原文为准。
AI总结:
本文提出小质量比极限下分析黑洞并合-铃宕波形的框架,发现波形分为三阶段,并证明二次准正规模主导铃宕,强调引力记忆的非线性效应。
AI中文摘要:
过去二十年的研究揭示了黑洞双星并合及随后铃宕的丰富现象学,涉及准正规模(QNMs)、非线性效应、尾部、瞬态以及包括引力记忆在内的长期效应。在此,我们发展了一个框架,用于在小质量比极限下分析非线性并合-铃宕特征,在该极限下各个效应可以被清晰地分离。针对近圆、无自旋黑洞双星的特殊情况,我们发现波形清晰地分为并合前的长旋进阶段、持续约半个周期的并合阶段,以及由准正规模主导的并合后铃宕阶段。我们证明,在可比至中等质量比下,二次准正规模在铃宕阶段主导线性泛音,并强调了引力波记忆的非线性效应,包括类似于视界吸收效应的立方波区现象。
英文摘要:
Work over the past two decades has unveiled the rich phenomenology of black hole binary mergers and subsequent ringdowns, involving a tapestry of quasinormal modes (QNMs), nonlinearities, tails, transients, and secular effects including gravitational memory. Here we develop a framework for analyzing nonlinear merger-ringdown features in the small-mass-ratio limit, where individual effects can be cleanly isolated. Specializing to the case of a quasicircular, nonspinning black hole binary, we find the waveform sharply divides into a pre-merger extended inspiral phase, a merger phase lasting roughly half a cycle, and a post-merger ringdown dominated by QNMs. We show quadratic QNMs dominate over linear overtones in the ringdown phase for comparable-to-intermediate mass ratios, and we highlight nonlinear effects of gravitational-wave memory, including cubic wave-zone phenomena analogous to horizon absorption effects.