2025/10/11 by Huang, Shilong, Chen, Jiawei, Yang, Jinsong · 2 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)
paper · doi:10.48550/arxiv.2510.09956
Latest advances in effective quantum gravity propose a quantum-corrected black hole solution that avoids Cauchy horizons. In this paper, we study the image of the black hole and explore the influence of the quantum parameter ζ on its image. First, we investigate the influence of ζ on the event horizon, photon sphere, critical impact parameter, and innermost stable circular orbit associated with the black hole. We find that all these quantities exhibit an increase with increasing ζ. Meanwhile, we analyze the allowed range of ζ from both theoretical and observational perspectives. We then derive the photon trajectory equation and analyze briefly the behavior of the trajectories. A detailed analysis shows that as ζ increases, the photon trajectories near the event horizon undergo modifications. Finally, by plotting the optical appearance of the black hole under three emission models, we find that as ζ increases, the quantum-corrected black hole exhibits a larger shadow, along with a brightening of the bright rings and a reduction in the spacing between them near the critical impact parameter. Therefore, we can distinguish the quantum-corrected black hole from the Schwarzschild one by its unique optical appearance.