Astrophysical implications of quantum-improved charged black holes: Insights into quantum gravity and black hole phenomena

Abstract

This study examines the quantum-improved charged black hole and examines the influence of higher-order thermal fluctuations on its corrected energies. The research aims to assess the null geodesics, shadow radius, quasinormal modes, and emission energy of the black hole. Observations are made on the impact of the quantum parameter and charge of the black hole geometry on the Schwarzschild black hole. The location of the event horizon is determined by the physical characteristics, where larger values of the quantum parameter lead to the event horizon being visible only for lower values of charge. The entropy of the black hole exhibits fluctuations for smaller black holes and grows consistently for bigger black holes. The Helmholtz free energy decreases as the quantum parameter decreases and grows monotonically for bigger black holes. The internal energy and enthalpy of the black hole fluctuate depending on the specific parameter choices. The thermodynamic stability of the quantum-improved charged black hole is determined to be greater than that of the quantum-improved Schwarzschild black hole. The photon radius, shadow radius, and real part of the quasinormal modes frequency exhibit a positive correlation with the rise in charge and quantum parameter, however, the size of the imaginary component has a negative correlation. The emission energy rate reaches a maximum value and then decreases. Overall, it is found that the quantum correction parameter greatly effects the physical characteristics of the charged black hole. This research enhances our comprehension of quantum gravity and has ramifications for many astrophysical phenomena related to black holes.