Ionized Gas Kinematics along the Large-Scale Radio Jets in Type 2 AGNs

TL;DR

This study examines ionized gas movements in six radio-loud Type 2 AGNs to explore potential links between radio jets and gas outflows, finding no direct connection between them.

Contribution

It provides detailed kinematic analysis of ionized gas along large-scale radio jets in Type 2 AGNs, highlighting the lack of a direct link between outflows and radio jets.

Findings

Central AGN-photoionization radii range 0.9-1.6 kpc

No direct evidence linking gas outflows to large-scale radio jets

Size-luminosity relation of [O III] consistent with previous studies

Abstract

To investigate the connection between radio activity and AGN outflows, we present a study of ionized gas kinematics based on [O III] $\lambda$5007 emission line along the large-scale radio jet for six radio AGNs. These AGNs are selected based on the radio activity (i.e., $\mathrm{L_{1.4GHz}}$ $\geqslant$ 10$^{39.8}$ erg s$^{-1}$) as well as optical emission line properties as type 2 AGNs. Using the Red Channel Cross Dispersed Echellette Spectrograph at the Multiple Mirror Telescope, we investigate in detail the [O III] and stellar kinematics. We spatially resolve and probe the central AGN-photoionization sizes, which is important in understanding the structures and evolutions of galaxies. We find that the typical central AGN-photoionization radius of our targets are in range of 0.9$-$1.6 kpc, consistent with the size-luminosity relation of [O III] in the previous studies. We investigate the [O III] kinematics along the large-scale radio jets to test whether there is a link between gas outflows in the narrow-line region and extended radio jet emissions. Contrary to our expectation, we find no evidence that the gas outflows are directly connected to the large scale radio jets.