The shadow and accretion disk images of the rotation loop quantum black bounce

TL;DR

This paper analyzes the shadow and accretion disk images of a Loop Quantum Gravity inspired black bounce, revealing how quantum and rotational parameters influence observable features, aiding in black hole parameter estimation and quantum gravity detection.

Contribution

It introduces a detailed analysis of LQG-inspired black bounce shadows and accretion disk images using ray-tracing, highlighting the effects of quantum and rotation parameters on observable features.

Findings

Shadow size decreases with increasing alpha and a, with a having a more significant impact.

Inclination angle affects image asymmetry and inner shadow distortion.

Redshift and intensity distributions depend on accretion flow behavior and observation angle.

Abstract

In this paper, we study the shadow and observational image of the Kerr-like Loop Quantum Gravity (LQG) inspired black bounce with the help of the celestial light source and the thin disk source by employing the backward ray-tracing method. The results indicate that both the LQG parameter alpha and the rotation parameter a contribute to a reduction in the shadow size; however, the influence of a is predominant, while the effect of alpha circular orbit. One can find that the correlation parameter (a, alpha), along with the observer's inclination angle, affect the image's asymmetry and the distortion of the inner shadow. As the inclination increases, the direct and lensed images diverge, creating a structure resembling a hat. Meanwhile, we also investigate the redshift distribution of the direct lensed images of the accretion disk under different parameters and observation angle. The results show that the distribution of redshift and observed intensity is obviously related to the behavior of accretion flow. These results may provide a potential approach to limit black hole parameters, detect quantum gravity effects, and distinguish the LQG black hole from other black hole models.