Using Collisions of AGN Outflows with ICM Shocks as Dynamical Probes

TL;DR

This paper develops a formalism linking the morphology of radio AGNs in galaxy clusters to the dynamical state of the intracluster medium, focusing on jet-shock interactions and Mach number effects.

Contribution

It introduces a simple set of relationships connecting AGN jet dynamics with the ambient medium's state, applicable to both relativistic and non-relativistic jets.

Findings

Formalism emphasizes the role of Mach numbers in jet evolution.

Interactions with ICM shocks influence AGN outflow morphology.

Tools provided to interpret radio AGN observations in cluster environments.

Abstract

In this paper we lay out a simple set of relationships connecting the dynamics of fast plasma jets to the dynamical state of their ambient media. The objective is to provide a tool kit that can be used to connect the morphologies of radio AGNs in galaxy clusters to the dynamical state of the local ICM. The formalism is intended to apply to jets whether they are relativistic or non-relativistic. Special attention is paid to interactions involving ICM shocks, although the results can be applied more broadly. Our formalism emphasizes the importance of the relative Mach number of the impacting ICM flow and the internal Mach number of the AGN jet in determining how the AGN outflows evolve.