LLAGN and jet-scaling probed with the EVN

TL;DR

This study uses EVN observations to explore the relationship between radio and X-ray emissions in low-luminosity AGN, aiming to understand deviations from established black hole scaling relations.

Contribution

It provides new observational data on LLAGN with high radio power, challenging existing models of black hole accretion and jet production.

Findings

LLAGN show higher radio luminosity than predicted by standard models.

Results suggest a possible different jet-accretion coupling in LLAGN.

Data may help refine the universal black hole scaling relations.

Abstract

Accreting black holes on all mass scales (from stellar to supermassive) appear to follow a nonlinear relation between X-ray luminosity, radio luminosity and BH mass, indicating that similar physical processes drive the central engines in X-ray binaries and active galactic nuclei (AGN). However, in recent years an increasing number of BH systems have been identified that do not fit into this scheme. These outliers may be the key to understand how BH systems are powered by accretion. Here we present results from EVN observations of a sample of low-luminosity AGN (LLAGN) with known mass that have unusually high radio powers when compared with their X-ray luminosity.