Light curves of the hot spots on circular orbits around generic regular black holes related to non-linear electrodynamics with Maxwellian weak-field Limit

TL;DR

This paper investigates how strong gravitational and electromagnetic fields near a regular black hole influence the radiation flux from hot spots on orbit, comparing these effects to standard black holes to understand photon motion and flux variations.

Contribution

It introduces a detailed analysis of hot spot light curves around regular black holes in non-linear electrodynamics, highlighting differences from classical black holes.

Findings

Flux differences between regular and standard black holes

Impact of effective geometry on photon trajectories

Gravitational lensing effects on radiation flux

Abstract

The combined effect of a strong gravitational field and electromagnetic field in the vicinity of a generic regular black hole related to non-linear electrodynamics with Maxwellian weak-field limit on the radiation flux of a hot spot orbiting the regular black hole on the Keplerian disc has been studied. The frequency shift due to the strong gravitational field and magnification of the radiation related to gravitational lensing have been calculated. We compare the flux related to the Maxwellian regular black hole to the flux of the hot spots moving with the same orbital period around standard Schwarzschild and Raissner-Nordstrom black holes to illustrate the role of the effective geometry governing photon motion around the regular black hole.