VLBI studies of TANAMI radio galaxies

TL;DR

This paper presents VLBI observations of TANAMI radio galaxies, focusing on high-resolution imaging and jet kinematics to understand AGN jet properties, especially in gamma-ray faint radio galaxies, with preliminary results on PKS 0521-36.

Contribution

It introduces a VLBI monitoring approach for Southern hemisphere radio galaxies, providing new high-resolution maps and initial jet kinematic analysis, particularly for gamma-ray faint AGN.

Findings

High-resolution VLBI maps at 8.4 and 22.3 GHz

Preliminary jet kinematic analysis of PKS 0521-36

Insights into AGN jet properties in gamma-ray faint radio galaxies

Abstract

Radio galaxies are relatively faint at $\gamma$-ray energies, where they make up only 1-2% of all AGN detected by Fermi-LAT. However, they offer a unique perspective to study the intrinsic properties of AGN jets. For this reason, the combination of $\gamma$-ray and multi-wavelength data with high-resolution VLBI monitoring is a powerful tool to tackle the basic unanswered questions about AGN jets. Here we present preliminary results from a sample study of radio galaxies in the Southern hemisphere observed by the TANAMI VLBI monitoring program. We obtain high-resolution maps at 8.4 and 22.3 GHz, and study the jet kinematics using multi-epoch data. We present a preliminary kinematic analysis for the peculiar $\gamma$-ray AGN PKS 0521$-$36.