Probing a non-linear electrodynamics black hole with thin accretion disk, shadow, and deflection angle with M87*and Sgr A* from EHT

Non-linear interaction between the electromagnetic fields (EMF) occurs when vacuum polarization in quantum electrodynamics (QED) happens. The field of non-linear electrodynamics, which may result from this interaction, could have important effects on black hole physics. This paper considers the asymptotically flat black hole solution in Einstein-nonlinear electrodynamics (NLE) fields. We study the effect of the NLE parameters on the black hole deflection angle using the Gauss-Bonnet theorem in weak field limits, shadow cast using the null geodesics method, and thin accretion disk using the Novikov-Thorne model. In particular, we studied the time-averaged energy flux, the disk temperature, the differential luminosity, the different emission profiles, and infalling spherical accretion. Then we show how the physical quantities depend on beta and C parameters of NLE and provide some constraints on the NLE parameters using the observations of M87* and Sgr A* from EHT.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

This paper investigates the asymptotically flat black hole solution in Einstein-nonlinear electrodynamics (NLE) fields and explores the effects of NLE parameters on the black hole deflection angle. The study employs the Gauss-Bonnet theorem for weak field limits, shadow casting using null geodesics, and thin accretion disk modeling. The research also examines various physical quantities such as energy flux, disk temperature, differential luminosity, emission profiles, and spherical accretion, and provides constraints on the NLE parameters based on observations of M87* and Sgr A* from EHT.