The distribution and lifetime of powerful radio galaxies as a function of environment and redshift

TL;DR

This paper investigates how the power, lifetime, and distribution of powerful radio galaxies vary with environment and redshift, revealing insights into their evolution and classification.

Contribution

It introduces a phenomenological framework linking radio galaxy properties, environment, and redshift, advancing understanding of radio loud/quiet dichotomy and jet-disk connection.

Findings

Correlations between jet power and active time for different radio galaxy types.

Evidence for non-random distribution of radio galaxies based on environment and redshift.

Identification of weak line radio galaxies as a transitional class.

Abstract

Correlations between jet power and active time for z < 0.1 high excitation and low excitation radio galaxies are explored as well as evidence in favor of a specific, non-random distribution for these objects including mid-infrared emitting radio galaxies as a function of environment and redshift. In addition, so-called weak line radio galaxies with FRII jet morphology have been identified as a class of active galaxies in the process of shutting down. This paper identifies common features between these seemingly disparate phenomena described above for the population of radio galaxies, and strings them together by way of a simple phenomenological framework that has shed light on the radio loud/radio quiet dichotomy, the jet-disk connection, and the distribution of all active galaxies as a function of redshift.