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

TL;DR

This paper presents exact solutions for vortex dynamics in accretion flows, showing how converging flows can accelerate and eject ring vortices, potentially explaining jet formation in active galactic nuclei.

Contribution

It introduces exact hydrodynamic solutions for vortex behavior in AGN flows, linking vortex ejection to convergent flow dynamics and flow asymmetries.

Findings

Toroidal vortices are accelerated and ejected along the axis in converging flows.

Velocity increase depends on the monopole component of the flow.

Flow asymmetry influences ejection asymmetry.

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.