The Physics of turbulent and dynamically unstable Herbig-Haro jets

TL;DR

This paper models the turbulent and unstable Herbig-Haro jets to explain their complex shapes, velocity profiles, and brightness variations through analytical and kinematic approaches, enhancing understanding of their physical properties.

Contribution

It introduces models for turbulent jets to explain Herbig-Haro objects' properties and complex shapes, integrating kinematic effects and geometrical analysis of brightness enhancements.

Findings

Herbig-Haro objects' velocity and energy profiles explained by turbulent jet models

Complex shapes like HH34's arc explained by combined kinematic effects

Brightness enhancements analyzed through geometrical properties of the torus

Abstract

The overall properties of the Herbig-Haro objects such as centerline velocity, transversal profile of velocity, flow of mass and energy are explained adopting two models for the turbulent jet. The complex shapes of the Herbig-Haro objects, such as the arc in HH34 can be explained introducing the combination of different kinematic effects such as velocity behavior along the main direction of the jet and the velocity of the star in the interstellar medium. The behavior of the intensity or brightness of the line of emission is explored in three different cases : transversal 1D cut, longitudinal 1D cut and 2D map. An analytical explanation for the enhancement in intensity or brightness such as usually modeled by the bow shock is given by a careful analysis of the geometrical properties of the torus.