Acceleration and ejection of ring vortexes by a convergent flow as a probable mechanism of arising jet components of AGN

Abstract

Exact solutions of two-dimensional hydrodynamics equations for the symmetric configurations of two and four vortices in the presence of an arbitrary flow with a singular point are found. The solutions describe the dynamics of the dipole toroidal vortex in accretion and wind flows in active galactic nuclei. It is shown that the toroidal vortices in a converging (accretion) flow, being compressed along the large radius, are ejected with acceleration along the axis of symmetry of the nucleus, forming the components of two-sided jet. The increment of velocities of the vortices is determined by the monopole component of the flow only. The dipole component of the flow determines the asymmetry of ejections in the case of an asymmetric flow.

11 pages, 4 figures, the paper basically corresponds to the text published in proceedings of the conference "Transformation of waves, coherent structures and turbulence", 2009, p.304 (in Russian)