Particle motion around charged black holes in generalized dilaton-axion gravity

TL;DR

This paper investigates the trajectories of particles around charged black holes in generalized dilaton-axion gravity, analyzing effective potentials and particle motion using Hamilton-Jacobi methods.

Contribution

It provides a detailed analysis of particle dynamics in this gravity model, including static and non-static cases, which is a novel exploration in this context.

Findings

Effective potential plots for particle motion

Particle trajectories in static and non-static equilibrium

Insights into charged particle behavior around black holes

Abstract

The behaviour of massive and massless test particles around asymptotically flat and spherically symmetric, charged black holes in the context of generalized dilaton-axion gravity in four dimensions is studied. All the possible motions are investigated by calculating and plotting the corresponding effective potential for the massless and massive particles as well. Further, the motion of massive (charged or uncharged) test particles in the gravitational field of charged black holes in generalized dilaton-axion gravity for the cases of static and non-static equilibrium is investigated by applying the Hamilton-Jacobi approach.