Gravitational lensing by a regular black hole

TL;DR

This paper investigates the gravitational lensing effects of a regular Bardeen black hole, deriving deflection angles and image properties, and applies the findings to the supermassive black hole at our galaxy's center.

Contribution

It introduces a detailed analysis of lensing by a regular Bardeen black hole, including strong deflection limits and relativistic image predictions, which is novel compared to previous studies on singular black holes.

Findings

Derived the strong deflection limit for Bardeen black holes

Calculated positions and magnifications of relativistic images

Applied results to the supermassive black hole at the galactic center

Abstract

In this paper, we study a regular Bardeen black hole as a gravitational lens. We find the strong deflection limit for the deflection angle, from which we obtain the positions and magnifications of the relativistic images. As an example, we apply the results to the particular case of the supermassive black hole at the center of our galaxy.