What is in a radio loud NLS1?

TL;DR

This study investigates the properties of radio loud Narrow Line Seyfert 1 galaxies, focusing on their host galaxy morphology, infrared emission, and sub-millimeter characteristics to understand their jet activity and star formation.

Contribution

It provides new sub-millimeter observations of radio loud NLS1 galaxies, highlighting their complex host galaxy features and potential merger activity.

Findings

Infrared emission suggests active star formation in host galaxies.

Sub-millimeter data reveal properties of the interstellar medium.

Evidence of merger processes in some host galaxies.

Abstract

A fraction of Narrow Line Seyfert 1 galaxies (NLS1) are hosted by galaxies that present a disturbed morphology, in some cases hinting for merger processes, that are putative sources of gas replenishment. We have been investigating the poorly studied population of radio loud NLS1 (RL-NLS1) showing a flat radio spectrum, assumed to be the manifestation of the presence of a radio jet. In some of the objects the infrared emission is well fitted by a combination of an AGN component and an "active" host galaxy component like M82, the estimate SFR being in the LIRG/ULIRG range (10-500 Msun/year). In order to better characterize that component, we have been investigating the sub-millimeter/millimeter emission of the sources using APEX. Here we present the results concerning a pilot sample of 2 representative objects.