Imprints of non-commutativity on charged black holes

TL;DR

This paper investigates how non-commutative geometry affects charged black hole properties, including thermodynamics, radiation, quasinormal modes, and observational signatures, linking quantum gravity effects with astrophysical observations.

Contribution

It derives a deformed metric for NC charged black holes, analyzes thermodynamic and radiative modifications, and compares lensing predictions with observational data, providing new insights into quantum gravity effects.

Findings

Modified Hawking temperature and heat capacity due to non-commutativity

Existence of a remnant mass at black hole evaporation end

Constraints on non-commutativity parameter from lensing observations

Abstract

This work presents a comprehensive investigation of the gravitational phenomena that correspond to a non-commutative (NC) charged black hole, by incorporating NC geometry through a Moyal twist. We derive the deformed metric up to the second order of the NC parameter, utilizing the Seiberg-Witten map for the Reissner-Nordstrom black hole. We explore how non-commutativity modifies key thermodynamic properties, such as the Hawking temperature and heat capacity, and the existence of a remnant mass at the final stage of evaporation. Additionally, the study of Hawking radiation for bosonic and fermionic particles is discussed. Applying a perturbative method, scalar quasinormal modes are analyzed numerically. Furthermore, null geodesics and photon sphere stability are explored via curvature and topological methods. The shadow radius and deflection angle are computed to understand observational signatures. Lensing observables are compared to Event Horizon Telescope observations to provide probable constraints on the non-commutativity parameter. This study bridges theoretical predictions with astrophysical observations, offering insights into quantum gravity effects on black hole physics.