SPINNING PARTICLES IN THE KERR FIELD

Mathisson-Papapetrou equations are solved numerically to obtain trajectories of spinning test particles in (the meridional section of) the Kerr spacetime. The conditions p_σS^μσ = 0 are used to close the system of equations. A spin-curvature interaction may in principle lead to considerable deviations from geodesic motion. However, in astrophysical situations probably no large spin effects can be expected for the values of spin consistent with a pole-dipole test-particle approximation.