An updated view on the parent population of $\gamma$-ray emitting narrow-line Seyfert 1 galaxies

TL;DR

This paper reviews recent advances in understanding the parent population of gamma-ray emitting narrow-line Seyfert 1 galaxies, highlighting new survey data and proposing a revised unification model for young jetted AGN.

Contribution

It introduces new observational insights from a recent VLA survey and proposes a revised unification model for young jetted active galactic nuclei.

Findings

VLA survey data significantly impacts parent population understanding

New unification model for young jetted AGN proposed

Enhanced understanding of physical properties of RLNLS1s

Abstract

The discovery of $\gamma$-ray emission from some radio-loud narrow-line Seyfert 1 galaxies (RLNLS1s) indicated the presence of a relativistic beamed jet in these objects. This immediately opened a new question about their parent population: is how do they look like when observed at large angles? The study of the parent population has provided important new insights on the physical properties of this fascinating class of active galactic nuclei (AGN). In this work, I will review the most recent advances in the study of parent sources, and I will show the impact that a recent continuum survey carried out with the Karl G. Jansky Very Large Array had on this topic. Finally, I will show how all these new results point toward a new unification model for young jetted AGN.