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arXiv 2301.06558gr-qc
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进动双黑洞形成的黑洞的铃振频率

Ringdown frequencies in black holes formed from precessing black-hole binaries

Eleanor Hamilton, Lionel London, Mark Hannam

AI总结:

提出了计算共进动系下进动双黑洞有效铃振频率的简单公式,并分析了惯性系中铃振频率振荡的成因及应用。

摘要:

我们提出了一个简单的公式,用于计算共进动系下进动双黑洞引力波信号的有效铃振频率。该公式仅需知道系统的拟正则模频率以及铃振期间的进动角 $β$。此公式对进动系统建模非常有用。我们还全面描述了在最终黑洞自旋指向 $z$ 方向的惯性系中铃振频率的振荡现象。这些振荡源于正向和逆向频率的叠加。我们对这些振荡的理解可用于从数值数据中提取正向和逆向频率的振幅比。或者,利用该振幅比的知识可以构建铃振频率时域振荡的简单模型。

英文摘要:

We present a simple formula for the effective ringdown frequencies of the gravitational-wave signal of a precessing black-hole binary in the co-precessing frame. This formula requires only knowledge of the quasi-normal mode frequencies of the system and the value of the precession angle $β$ during ringdown. Such a formula will be useful in modelling precessing systems. We also provide a comprehensive description of the oscillations in the ringdown frequency in an inertial frame where the spin of the final black hole is in the $z$-direction. These oscillations arise due to the superposition of the prograde and retrograde frequencies. Our understanding of these oscillations can be used to extract the ratio of the amplitudes of the prograde and retrograde frequencies from numerical data. Alternatively, knowledge of this ratio of the amplitudes can be used to produce a simple model of the time domain oscillations in the ringdown frequency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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