论文标题
爱因斯坦 - 斯卡尔 - 高斯 - 骨网中的二进制黑洞合并的非线性研究
Nonlinear studies of binary black hole mergers in Einstein-scalar-Gauss-Bonnet gravity
论文作者
论文摘要
我们通过数值演变为移动对称的爱因斯坦标量高斯 - 高斯 - 骨网重力来研究具有标量电荷的二进制黑洞系统的非线性动力学。我们考虑具有不同质量比例的准圆形二进制文件，改变了高斯 - 骨网耦合并量化其对发射标量和重力波的影响。我们将数值结果与牛顿后对灵感过程中发出的辐射的计算进行了比较。我们证明了牛顿后理论在建模标量波形的幅度时的准确性，但发现至少在合并之前的最后几个轨道中，当前可用的牛顿后理论不足以模拟该理论中重力波信号的倾向。我们进一步发现，在合并时标量场中存在不可忽略的非线性增强，但是对峰值重力波发射的影响很小。
We study the nonlinear dynamics of binary black hole systems with scalar charge by numerically evolving the full equations of motion for shift-symmetric Einstein scalar Gauss-Bonnet gravity. We consider quasi-circular binaries with different mass-ratios, varying the Gauss-Bonnet coupling and quantifying its impact on the emitted scalar and gravitational waves. We compare our numerical results to post-Newtonian calculations of the radiation emitted during the inspiral. We demonstrate the accuracy of the leading-order terms in post-Newtonian theory in modeling the amplitude of the scalar waveform, but find that, at least for the last few orbits before merger, the currently available post-Newtonian theory is not sufficient to model the dephasing of the gravitational wave signal in this theory. We further find that there is non-negligible nonlinear enhancement in the scalar field at merger, but that the effect on the peak gravitational wave emission is small.
