Studies on slow radio transients

TL;DR

This paper reviews extensive studies of active galactic nuclei transitioning to radio-loud states, highlighting their diverse properties and introducing a new project to investigate slow radio transients.

Contribution

It provides a comprehensive overview of AGNs evolving into radio-loud states and proposes a novel observational project focused on slow radio transients.

Findings

Diverse physical parameters among studied AGNs.

Identification of gigahertz-peaked spectrum objects with rapid changes.

Introduction of a new observational approach for slow radio transients.

Abstract

We present a brief overview of a very extensive studies of the group of active galactic nuclei (AGNs) that transitioned to radio-loud state over the past few decades. The sample consists of twelve sources, both quasars and galaxies, showing the characteristics of gigahertz-peaked spectrum (GPS) objects undergoing relatively rapid changes, due to the evolution of their newly-born radio jets. Discussed objects also show a wide range of physical parameters such as bolometric luminosity, black hole mass and jet power, suggesting a great diversity among young active galactic nuclei and their hosts. Furthermore, we introduce a new observational project, the aim of which will be to investigate and gain a more in-depth understanding of the phenomenon of slow radio transients.