Speaker
Description
We explore the dynamics of magnetized test particles in the Schwarzschild spacetime under the influence of a large-scale magnetic field. This work is well-motivated astrophysically by the dynamics of magnetized inhomogeneities in accretion flows around compact objects such as black holes or neutron stars. It could also be motivated by the dynamics of compact, magnetized neutron stars around supermassive galactic black holes.
We calculate the fundamental frequencies of small harmonic oscillations around a stable circular orbit in the equatorial plane, providing a basic timescale for astrophysical processes in magnetized plasma. The frequencies obtained are then applied to various astrophysical problems, such as the inner stability of accretion flows, flare dynamics around the supermassive black hole in the SgrA* source, and the observed quasi-periodic oscillations around neutron stars and black holes.