Classical and relativistic flux of energy conservation in astrophysical jets

TL;DR

This paper derives energy flux conservation laws for turbulent astrophysical jets in different intergalactic media, providing analytical models for jet dynamics and magnetic field evolution with applications to specific radio sources.

Contribution

It introduces analytical models for energy flux conservation in classical and relativistic jets considering various IGM density profiles and relates magnetic field evolution to jet dynamics.

Findings

Derived analytical laws for jet motion in different IGM profiles.

Modeled magnetic field evolution along radio jets.

Applied models to NGC315 and 3C273 observations.

Abstract

The conservation of the energy flux in turbulent jets which propagate in the intergalactic medium (IGM) allows deducing the law of motion in the classical and relativistic cases. Three types of IGM are considered: constant density, hyperbolic and inverse power law decrease of density. An analytical law for the evolution of the magnetic field along the radio-jets is deduced using a linear relation between the magnetic pressure and the rest density. Astrophysical applications are made to the centerline intensity of synchrotron emission in NGC315 and to the magnetic field of 3C273.