Gravitational Lensing in Kerr-Newman Anti de Sitter Spacetime

Abstract

The method of Rindler and Ishak enables one to study how light is bent in the vicinity of a non-rotating and spherically symmetric gravitational lens. This method mainly aims to investigate the role of cosmological constant in the consequent path. In this paper, we use the extension of Rindler-Ishak method (RIM) in order to evaluate the deflection angle of null geodesics in the equatorial plane of Kerr-Newman anti de Sitter (KNAdS) spacetime. We then use astrophysical data to see the effect of rotation and charge on the bending angle of light for seven distinct stars and two black holes under the assumption of having a KNAdS background with a negative cosmological constant $\Lambda$.

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• Observational Signatures: Shadow cast by the effective metric of photons for black holes with rational non-linear electrodynamics
• Thermodynamics of Einstein-Euler-Heisenberg Black Holes with Thermal Fluctuations and Nonlinear Electromagnetic Fields
• Gravitational lensing by traversable wormholes supported by three-form fields
• Test of conformal theory of gravity as an alternative paradigm to dark matter hypothesis from gravitational lensing studies
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