Shadows of exact binary black holes
Shadows of exact binary black holes
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DOI：
10.1103/physrevd.98.044053
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发表时间：
2018-05
影响因子：
5
通讯作者：
P. Cunha;C. Herdeiro;Maria J Rodriguez
中科院分区：
文献类型：
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作者：
P. Cunha;C. Herdeiro;Maria J Rodriguez
在昂贵的完全非线性相对论数值模拟的基础上，通过射线追踪技术在动态双星黑洞（BBHs）中产生了黑洞（BH）阴影。我们发现，这些阴影的主要特点是捕获一个简单的准静态分辨率的光子轨道上的静态双史瓦西家庭的解决方案。虽然后者包含一个圆锥奇点之间的线分开的两个BH，这不会产生重大的可观察到的影响的阴影，凭借潜在的圆柱对称性的问题。这种对称性也存在于固定BBH解决方案，包括两个克尔BH分离的无质量支柱。我们产生的阴影的确切固定的共同旋转（偶）和反向旋转（奇）固定BBH配置的图像。这使我们能够评估的影响，对二进制阴影的内在自旋的黑洞，对比它的影响的轨道角动量。
Black hole (BH) shadows in dynamical binary BHs (BBHs) have been produced via ray-tracing techniques on top of expensive fully non-linear numerical relativity simulations. We show that the main features of these shadows are captured by a simple quasi-static resolution of the photon orbits on top of the static double-Schwarzschild family of solutions. Whilst the latter contains a conical singularity between the line separating the two BHs, this produces no major observable effect on the shadows, by virtue of the underlying cylindrical symmetry of the problem. This symmetry is also present in the stationary BBH solution comprising two Kerr BHs separated by a massless strut. We produce images of the shadows of the exact stationary co-rotating (even) and counter-rotating (odd) stationary BBH configurations. This allow us to assess the impact on the binary shadows of the intrinsic spin of the BHs, contrasting it with the effect of the orbital angular momentum.