Positive and negative feedback by AGN jets in high-redshift galaxies

TL;DR

This paper reviews recent simulations of AGN jet feedback in high-redshift galaxies, highlighting the complex interactions with multi-phase interstellar media and their dual role in galaxy evolution.

Contribution

It presents new insights into how AGN jets interact with inhomogeneous ISM, emphasizing the dual positive and negative feedback effects in galaxy evolution models.

Findings

Jets interact differently with various ISM phases

Positive feedback can promote star formation

Negative feedback suppresses star formation

Abstract

Simulations of feedback by jets from active galactic nuclei (AGN) in the past mostly focused on the interaction at large scales as the circumgalactic medium or intra-cluster medium for clusters of galaxies. Only in recent years, simulations have included the interaction of jets with a highly inhomogeneous medium as required by a multi-phase interstellar medium (ISM). At the same time, feedback by AGN has become a common component for cosmological simulations of galaxy evolution to form massive galaxies compatible with observations. I will present some of our recent results and will put them into further context of other feedback simulations and how the opposing effects of positive and negative feedback by jets might be understood in terms of different properties of the ISM.