Perturbation theory of the adiabatic pressure-less rarefied-fluid axisymmetricaccretion objects

Pressure-less rarefied-fluid axisymmetric accretion objects are studied. The inviscid case and the rarefied viscous case with constant azimuthal component of the four-velocity in the pressure-less regime are addressed. The new General-Relativistic radial velocity slip flows expressions are analytically written in both the instances.