  Momentum can be regarded as a mass current that can be used as the source of
the gravitoelectromagnetic field, which is the weak-field gravitational
analogue of the classical electromagnetic field. Typically,
gravitoelectromagnetic research considers only mass currents of convective
type, which are collinear with the velocity vector field, but when one looks at
charged fluids that interact with a background electromagnetic field or
charged, spinning point-like matter, such as the Frenkel electron, or extended
spinning mass distributions, such as the Dirac electron and the Weyssenhoff
fluid, one will also encounter transverse momentum. The effects of that
transverse momentum on the gravitoelectromagnetic field are investigated.
