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arXiv 2401.14532gr-qc
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黑洞微扰理论与数值相对论之间的映射 II:引力波动量

Mapping between black-hole perturbation theory and numerical relativity II: gravitational-wave momentum

Tousif Islam

AI总结:

本文提出 NR 与 BHPT 引力波动量之间的双参数时间无关映射,验证其在并合前的有效性,并分析质量比依赖、有限尺寸修正及遗迹属性意义。

摘要:

我们报告了在准圆形、无自旋双黑洞的可比质量区域中,从数值相对论(NR)和绝热点粒子黑洞微扰理论(BHPT)获得的引力波角(线性)动量之间的一种近似且非平凡的映射。该映射包含两个与时间无关的缩放参数 $α_{J}$($α_{P}$)和 $β_{J}$($β_{P}$),分别调整 BHPT 角(线性)动量和 BHPT 时间,使其与 NR 角(线性)动量对齐。我们的研究结果表明,这种缩放机制在接近并合之前都非常有效。除了将 $α_{J}$($α_{P}$)与从波形和通量缩放中获得的相关值进行比较外,我们还探讨了缩放参数 $α_{J}$($α_{P}$)对质量比的依赖关系。最后,我们研究了它们与 BHPT 框架中次级黑洞缺失的有限尺寸修正之间可能存在的联系,以及这些缩放对双黑洞遗迹属性的影响。

英文摘要:

We report an approximate, non-trivial mapping of angular (linear) momentum in gravitational waves obtained from numerical relativity (NR) and adiabatic point-particle black hole perturbation theory (BHPT) in the comparable mass regime for quasi-circular, non-spinning binary black holes. This mapping involves two time-independent scaling parameters, $α_{J}$ ($α_{P}$) and $β_{J}$ ($β_{P}$), that adjust the BHPT angular (linear) momentum and the BHPT time respectively such a way that it aligns with NR angular (linear) momentum. Our findings indicate that this scaling mechanism works really well until close to the merger. In addition to the comparison of $α_{J}$ ($α_{P}$) with relevant values obtained from the waveform and flux scalings, we explore the mass ratio dependence of the scaling parameter $α_{J}$ ($α_{P}$). Finally, we investigate their possible connection to the missing finite size correction for the secondary black hole within the BHPT framework and the implication of these scalings on the remnant properties of the binary.

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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