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arXiv 0911.2187gr-qcastro-ph.GA
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黑洞的引力透镜

Gravitational Lensing by Black Holes

V. Bozza

摘要:

我们回顾了黑洞对引力透镜的理论研究,并讨论了现实观测的前景。我们将首先讨论球对称黑洞的透镜效应,在这种情况下,以最清楚的方式出现了无限序列的高阶象。然后我们将考虑黑洞自旋的影响,形成巨大的高阶焦散线和多重图像。最后,我们将考虑黑洞透镜观测的前景,从恒星源和吸积盘上的斑点的二次图像的检测到铁K线的解释和黑洞阴影的直接成像。

英文摘要:

We review the theoretical aspects of gravitational lensing by black holes, and discuss the perspectives for realistic observations. We will first treat lensing by spherically symmetric black holes, in which the formation of infinite sequences of higher order images emerges in the clearest way. We will then consider the effects of the spin of the black hole, with the formation of giant higher order caustics and multiple images. Finally, we will consider the perspectives for observations of black hole lensing, from the detection of secondary images of stellar sources and spots on the accretion disk to the interpretation of iron K-lines and direct imaging of the shadow of the black hole.

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