The relation between morphology, accretion modes and environmental factors in local radio AGN

TL;DR

This study investigates how the morphology, accretion mode, and environment of local radio AGN are interconnected, using a comprehensive catalogue and multi-wavelength data to analyze their relationships.

Contribution

It provides new insights into the correlation between radio galaxy morphology, accretion modes, and environmental parameters using an expanded, multi-wavelength dataset.

Findings

Morphology correlates with accretion mode in radio AGN.

Environmental factors influence the morphology and accretion mode.

The study reveals a complex relationship between host galaxy properties and radio source characteristics.

Abstract

The goal of this work is to determine the nature of the relation between morphology and accretion mode in radio galaxies, including environmental parameters. The CoNFIG extended catalogue (improved by new Ks-band identifications and estimated redshifts from UKIDSS, and spectral index measurements from new GMRT observations) is used to select a sub-sample of 206 radio galaxies with z<0.3 over a wide range of radio luminosity, which are morphology-classified using the Fanaroff-Riley (FR) classification of extended radio sources. For each galaxy, spectroscopic data are retrieved to determine the high/low excitation status of the source, related to its accretion mode. Environmental factors, such as the host galaxy luminosity and a richness factor are also computed, generally using SDSS data.