Special Issue — Selected Papers of the Fifth Italian–Pakistani Workshop on Relativistic Astrophysics; Guest Editors: Francesco De Paolis, Vahe G. Gurzadyan, Achille A. Nucita and Azad A. SiddiquiNo Access

Gravitational lensing by black holes and their alternatives

Valerio Bozza

Valerio Bozza

Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, Via Giovanni Paolo II 132, Fisciano 84084, Italy

Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Italy

E-mail Address: valboz@sa.infn.it

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https://doi.org/10.1142/S0218271817410139Cited by:11 (Source: Crossref)

Abstract

Black holes have the ability to generate infinite number of images of any given source. These relativistic images are formed by light rays winding around the black hole several times. The phenomenology associated with these images is very rich, since these features are very sensitive to the metric structure of the black hole. Here, we review some aspects of gravitational lensing by black holes and consider some fundamental aspects related to alternative solutions, which do not reproduce Schwarzschild in the asymptotic limit and are supported by exotic matter.

Keywords:

PACS: 04.70.Bw, 98.62.Sb, 98.35.Jk, 04.20.Cv

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