Holographic Einstein rings of a black hole with a global monopole

TL;DR

This paper uses holographic methods to visualize Einstein rings around a black hole with a global monopole, revealing how the monopole parameter influences the ring's brightness and position, and demonstrating the potential to distinguish black hole types.

Contribution

It introduces a holographic approach to visualize Einstein rings of a black hole with a global monopole, highlighting the monopole's effect on ring features.

Findings

Holographic images show Einstein rings with distinct features depending on observer position.

The monopole parameter affects the brightness and position of the Einstein ring.

Holographic images can differentiate black hole types based on ring characteristics.

Abstract

The global monopole solutions which give rise to quite unusual physical phenomena have captured considerable attention. In this paper, we study the Einstein ring of the spherically symmetric AdS black hole solution with a global monopole based on the AdS/CFT correspondence. With the help of the given response function of the QFT on the boundary, we construct the holographic images of the black hole in the bulk. The Einstein rings on the images can be clearly observed. The holographic ring always appears with the concentric stripe surrounded when the observer located at the north pole, and an extremely bright ring when the observer is at the position of the photon sphere of the black hole. With the change of the observation position, this ring will change into a luminosity-deformed ring, or light points. Furthermore, we show that the monopole parameter has an effect on the brightness and the position of Einstein ring. All these results imply that the holographic images can be used as an effective tool to distinguish different types of black holes for fixed wave source and optical system.