Gravitational Lensing by Black Holes - General Relativity and Quantum CosmologyReport as inadecuate




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Abstract: We review the theoretical aspects of gravitational lensing by black holes,and discuss the perspectives for realistic observations. We will first treatlensing by spherically symmetric black holes, in which the formation ofinfinite sequences of higher order images emerges in the clearest way. We willthen consider the effects of the spin of the black hole, with the formation ofgiant higher order caustics and multiple images. Finally, we will consider theperspectives for observations of black hole lensing, from the detection ofsecondary images of stellar sources and spots on the accretion disk to theinterpretation of iron K-lines and direct imaging of the shadow of the blackhole.



Author: V. Bozza

Source: https://arxiv.org/







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