论文标题
来自二进制黑洞合并的视野新闻
News from horizons in binary black hole mergers
论文作者
论文摘要
在二进制黑洞合并中，众所周知，波形的灵感部分对应于两个不同的范围相互绕行，并且合并和环形信号对应于形成的最终视野并沉降到平衡。但是，我们仍然缺乏对这三个制度中的地平线几何形状与观察到的波形之间关系的详细理解。在这里，我们表明，众所周知的Inspiral Chirp波形在黑洞地平线上有一个清晰的对应物，即，即将到来的null射线的剪切。我们证明，剪切的行为非常像紧凑的二元合并波形，频率和振幅的增加。此外，从地平线估算的系统的参数与从波形估计的参数一致。这意味着，即使黑洞的视野与我们有因果关系，假设一般相对论是真实的，我们也可以从引力波观测中推断出它们的某些详细特性。
In a binary black hole merger, it is known that the inspiral portion of the waveform corresponds to two distinct horizons orbiting each other, and the merger and ringdown signals correspond to the final horizon being formed and settling down to equilibrium. However, we still lack a detailed understanding of the relation between the horizon geometry in these three regimes and the observed waveform. Here we show that the well known inspiral chirp waveform has a clear counterpart on black hole horizons, namely, the shear of the outgoing null rays at the horizon. We demonstrate that the shear behaves very much like a compact binary coalescence waveform with increasing frequency and amplitude. Furthermore, the parameters of the system estimated from the horizon agree with those estimated from the waveform. This implies that even though black hole horizons are causally disconnected from us, assuming general relativity to be true, we can potentially infer some of their detailed properties from gravitational wave observations.
