Is jet re-orientation the elusive trigger for star formation suppression in radio galaxies?

TL;DR

This paper investigates whether jet re-orientation in radio galaxies acts as a trigger for star formation suppression, especially in dense environments like groups and clusters, providing new insights into galaxy evolution.

Contribution

It introduces the idea that jet re-orientation may be the key factor in star formation suppression in radio galaxies, extending the understanding beyond isolated environments.

Findings

Jet re-orientation may trigger star formation suppression in radio galaxies.

FRII and FRI radio galaxies differ in their star formation activity due to jet orientation.

Radio 'red geyser' galaxies can be explained by jet re-orientation effects.

Abstract

Jet re-orientation associated with the time evolution of radio quasars explains the formation of X-shaped radio galaxies and their preference for isolated environments. But since X-shaped radio galaxies are generally not found in dense environments (e.g. groups/clusters), the jet re-orientation phenomenon for radio galaxies in groups and clusters has been ignored. We take a closer look at the re-orientation of FRI jets with respect to FRII jets, and find that it may constitute the as-yet unidentified trigger for star formation suppression in radio galaxies. We show how the recently explored radio "red geyser" galaxies can be interpreted in this context and ultimately reveal a deeper understanding of why FRII radio galaxies are on one side of the star formation enhancement/suppression divide compared to FRI radio galaxies.