Numerical binary black hole collisions in dynamical Chern-Simons gravity

Numerical binary black hole collisions in dynamical Chern-Simons gravity
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动力学陈-西蒙斯引力中的数值双黑洞碰撞

DOI:
10.1103/physrevd.100.104026
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
Teukolsky, Saul A.
Teukolsky, Saul A.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Okounkova, Maria;Stein, Leo C.;Scheel, Mark A.;Teukolsky, Saul A.

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我们产生了第一个数值相对论二元黑洞引力波形在一个更高的曲率理论超越广义相对论。特别地,我们研究了在降阶动力学Chern-Simons引力中的二元黑洞的迎头碰撞。这是产生超越广义相对论的波形的前兆,用于引力波探测的螺旋双黑洞系统。然而,正面碰撞本身就很有趣,因为它们干净地探测了最终黑洞的准正规模谱。因此,我们计算领先的顺序动力学陈-西蒙斯修改后合并引力辐射的复频率。我们考虑等质量系统,具有相同的自旋取向沿着碰撞轴,导致剩余的黑洞与自旋。我们发现修改的拟正规模式频谱的复杂频率的行为作为一个幂律与自旋的残余,并没有退化与克尔黑洞的任何质量和自旋的频率。我们讨论这些结果的背景下测试广义相对论引力波观测。
We produce the first numerical relativity binary black hole gravitational waveforms in a higher-curvature theory beyond general relativity. In particular, we study head-on collisions of binary black holes in order-reduced dynamical Chern-Simons gravity. This is a precursor to producing beyond-general-relativity waveforms for inspiraling binary black hole systems that are useful for gravitational wave detection. Head-on collisions are interesting in their own right, however, as they cleanly probe the quasinormal mode spectrum of the final black hole. We thus compute the leading-order dynamical Chern-Simons modifications to the complex frequencies of the postmerger gravitational radiation. We consider equal-mass systems, with equal spins oriented along the axis of collision, resulting in remnant black holes with spin. We find modifications to the complex frequencies of the quasinormal mode spectrum that behave as a power law with the spin of the remnant, and that are not degenerate with the frequencies associated with a Kerr black hole of any mass and spin. We discuss these results in the context of testing general relativity with gravitational wave observations.
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