Decoding black hole metrics from the interferometric pattern of relativistic images
Decoding black hole metrics from the interferometric pattern of relativistic images
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DOI：
10.1142/9789811269776_0318
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发表时间：
2023-01
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影响因子：
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通讯作者：
V. Bozza
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文献类型：
--
作者：
V. Bozza
黑洞周围的源的图像通过光子绕黑洞进行任意次数的旋转而被无限次复制。这样的相对论性图像在干涉观测中测量的复杂可见度中产生特征性的阶梯结构。对于准静态源，我们给出了描述引力透镜强偏转极限下可见度函数的解析公式。然后，这些公式被用于从可见性中的特征提取度量的属性。
The image of a source around a black hole is replicated an infinite number of times by photons performing an arbitrary number of turns around the black hole. Such relativistic images generate a characteristic staircase structure in the complex visibility measured in interferometric observations. For a quasi-static source, we present analytical formulae describing the visibility function in the strong deflection limit of gravitational lensing. These formulae are then used to extract the properties of the metric from features in the visibility.