Off-equatorial orbits in strong gravitational fields near compact objects

Understand

Near a black hole or an ultracompact star, motion of particles is governed by strong gravitational field.

• Electrically charged particles feel also electromagnetic force arising due to currents inside the star or plasma circling around.
• We study a possibility that the interplay between gravitational and electromagnetic action may allow for stable, energetically bound off-equatorial motion of charged particles.
• This would represent well-known generalized Stormer's 'halo' orbits, which have been discussed in connection with the motion of dust grains in planetary magnetospheres.