Escape trajectories versus magnetic entrapment: Charged particle dynamics in poloidal magnetic fields around schwarzschild black holes

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We examine the nonequatorial orbits of charged particles under the combined influence of Schwarzschild curvature and external purely poloidal magnetic fields the uniform and dipole ones corresponding to analytical solutions to the Maxwell equations in the given spacetime. Particle confinement in bound cross-equatorial orbits can occur, due to a magnetic bottle effect, but also natural escape trajectories can be obtained, without the need for additional devices like electric or toroidal magnetic fields previously invoked to this end. The conditions leading to either of these outcomes, entrapment or escape, are examined, and a comparison with the flat spacetime case is made, evaluating the role played by gravity in the overall charged particle dynamics. © 2009 World Scientific Publishing Company.

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International Journal of Modern Physics D

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