Mergers of black-hole binaries with aligned spins: Waveform characteristics
Mergers of black-hole binaries with aligned spins: Waveform characteristics
复制标题
自旋对齐的黑洞双星合并：波形特征
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Centrella
中科院分区：
文献类型：
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作者：
B. Kelly;J. Baker;W. D. Boggs;S. McWilliams;J. Centrella
我们对等质量对准自旋合并产生的引力辐射波的多极结构进行了描述性分析，采用了一种首次在不同质量比的非自旋黑洞的互补背景下提出的方法[J]。G. Baker等人，物理学。Rev. D 78, 044046（2008）。我们发现，与非自旋并合一样，主导波形模式相位通过激励和并合以锁步同步演变，支持了先前关于绝热刚性旋转体驱动引力波发射的波形描述——一个隐式旋转源。我们进一步应用了在[J]中引入的旋转频率的后期合并衰荡模型。G. Baker等人，物理学。Rev. D 78,044046（2008）。]，以及适用于主导模式（2,{+-}2）的改进振幅模型。这提供了对合并环衰波形的定量描述，并表明这些波形的主要特征可以仅参考与合并中形成的最终黑洞状态相关的内在参数来描述。我们提供了一个显式的合并环衰辐射模型，并证明该模型与原始数值波形的拟合系数优于95%，系统质量大于{约}150M{sub {center_dot}}。该模型可直接应用于对中等质量黑洞合并的引力波探测。«少
We conduct a descriptive analysis of the multipolar structure of gravitational-radiation waveforms from equal-mass aligned-spin mergers, following an approach first presented in the complementary context of nonspinning black holes of varying mass ratio [J. G. Baker et al., Phys. Rev. D 78, 044046 (2008).]. We find that, as with the nonspinning mergers, the dominant waveform mode phases evolve together in lock-step through inspiral and merger, supporting the previous waveform description in terms of an adiabatically rigid rotator driving gravitational-wave emission--an implicit rotating source. We further apply the late-time merger-ringdown model for the rotational frequency introduced in [J. G. Baker et al., Phys. Rev. D 78, 044046 (2008).], along with an improved amplitude model appropriate for the dominant (2, {+-}2) modes. This provides a quantitative description of the merger-ringdown waveforms, and suggests that the major features of these waveforms can be described with reference only to the intrinsic parameters associated with the state of the final black hole formed in the merger. We provide an explicit model for the merger-ringdown radiation, and demonstrate that this model agrees to fitting factors better than 95% with the original numerical waveforms for system masses above {approx}150M{sub {center_dot}}. This model may be directly applicable tomore » gravitational-wave detection of intermediate-mass black-hole mergers.« less