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arXiv 2104.06978gr-qcastro-ph.HE
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非自旋带电黑洞的准圆形螺旋和合并的数值相对论模拟:方法和与近似方法的比较

Numerical-relativity simulations of the quasi-circular inspiral and merger of non-spinning, charged black holes: methods and comparison with approximate approaches

Gabriele Bozzola, Vasileios Paschalidis

摘要:

我们提出了完全广义相对论模拟的准圆形inspiral和合并的收费,非自旋,二元黑洞与电荷质量比$λ\le 0.3$。我们讨论的关键功能,使这些二进制文件的长期和稳定的演变。我们还提出了一种计算电磁波携带的角动量的形式,以及电磁波对黑洞视界性质的贡献。我们实现我们的形式主义,并提出了第一次在数值相对论模拟的结果。此外,我们比较我们的完整的非线性解决方案与现有的近似模型的螺旋和振铃阶段。我们表明,牛顿模型的基础上的四极近似有20%-100%的误差在关键规范不变的数量。另一方面,对于所考虑的系统,我们发现,基于Kerr-Newman时空中测试粒子运动的残余黑洞自旋的估计与我们的非线性计算在百分之几以内一致。最后,我们讨论了未来的引力波探测器检测黑洞电荷的前景,无论是使用的inspiral-merge-ringdown信号或单独的ringdown信号。

英文摘要:

We present fully general relativistic simulations of the quasi-circular inspiral and merger of charged, non-spinning, binary black holes with charge-to-mass ratio $λ\le 0.3$. We discuss the key features that enabled long term and stable evolutions of these binaries. We also present a formalism for computing the angular momentum carried away by electromagnetic waves, and the electromagnetic contribution to black-hole horizon properties. We implement our formalism and present the results for the first time in numerical-relativity simulations. In addition, we compare our full non-linear solutions with existing approximate models for the inspiral and ringdown phases. We show that Newtonian models based on the quadrupole approximation have errors of 20 % - 100 % in key gauge-invariant quantities. On the other hand, for the systems considered, we find that estimates of the remnant black hole spin based on the motion of test particles in Kerr-Newman spacetimes agree with our non-linear calculations to within a few percent. Finally, we discuss the prospects for detecting black hole charge by future gravitational-wave detectors using either the inspiral-merger-ringdown signal or the ringdown signal alone.

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