Black-hole kicks from numerical-relativity surrogate models
Black-hole kicks from numerical-relativity surrogate models
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DOI：
10.1103/physrevd.97.104049
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发表时间：
2018-02
影响因子：
5
通讯作者：
D. Gerosa;F. H'ebert;L. Stein
中科院分区：
文献类型：
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作者：
D. Gerosa;F. H'ebert;L. Stein
双黑洞在合并时以引力波辐射线性动量。黑洞残余物所受的辐射能达到数千公里/秒，从而将黑洞从其宿主星系中喷射出来。我们利用引力波形建模的最新进展，快速，可靠地提取反冲赋予通用，进动，黑洞双星。我们的程序使用一个数值相对论代理模型，以获得一组二元参数的引力波形，然后，从这个波形，我们直接集成的引力波线性动量通量。这完全绕过了在天体物理学背景下通常用于模拟黑洞反冲的拟合公式的需要。我们提供了一个彻底的探索黑洞踢现象的参数空间，总结和扩展以前的数值结果的主题。我们的提取过程作为Python编程语言surrkick的模块公开提供。踢评估需要100.1秒的标准现成的机器，从而使我们的代码理想的移植到大规模的天体物理研究。
Binary black holes radiate linear momentum in gravitational waves as they merge. Recoils imparted to the black-hole remnant can reach thousands of km/s, thus ejecting black holes from their host galaxies. We exploit recent advances in gravitational waveform modeling to quickly and reliably extract recoils imparted to generic, precessing, black-hole binaries. Our procedure uses a numerical-relativity surrogate model to obtain the gravitational waveform given a set of binary parameters; then, from this waveform we directly integrate the gravitational-wave linear momentum flux. This entirely bypasses the need for fitting formulas which are typically used to model black-hole recoils in astrophysical contexts. We provide a thorough exploration of the black-hole kick phenomenology in the parameter space, summarizing and extending previous numerical results on the topic. Our extraction procedure is made publicly available as a module for the Python programming language named surrkick. Kick evaluations take ∼0.1 s on a standard off-the-shelf machine, thus making our code ideal to be ported to large-scale astrophysical studies.