Accretion and ejection in Hard X-ray selected AGN
A high-energy perspective on AGN
The HXAGN sample
Our work is based on the selection of AGN at hard X-rays (>20 keV). The hard X-ray selected sample of active galactic nuclei (HXAGN) has been extracted from the INTEGRAL/IBIS all sky survey performed so far in the 20-100 keV band (Malizia et al. 2020; plus current update Malizia et al. 2022, in preparation). Most of these objects are RQ with a small percentage (10%) being RL. The hard X-ray selection has allowed us to provide an unbiased view of moderately high luminous, highly accreting AGN. This allow us to tackle different aspects of the accretion/ejection phenomena, probing radio emission from a variety physical mechanisms.
The team
F. Panessa (INAF-IAPS, Italy)
G. Bruni (INAF-IAPS, Italy)
R. Baldi (INAF-IRA, Italy)
D. Dallacasa (INAF-IRA & DiFA, Italy)
A. Laor (Technion, Israel)
E. Behar (Technion, Israel)
I. McHardy (U. Southampton, UK)
F. Tombesi (U. Tor Vergata, Italy)
F. Vagnetti (U. Tor Vergata, Italy)
Former members
E. Chiaraluce (PhD, 2017-2021)
The radio survey
Radio observations of Active Galactic Nuclei (AGN) represent a powerful tool to study the variety of ejection phenomena observed, at different physical scales and with a wide range of powers. A wide-frequency radio approach is crucial to evaluate the intervening radiative mechanisms responsible for the observed emission and relate them with the underlying accretion physics.
Since 2017, our group is leading a radio survey on HXAGN using world-class facilities (VLA, EVN, AMI) to tackle the physical processes originating the radio emission. Our study probes the emission from kpc to pc scale, as well as a combined radio/X-rays variability study.
Publications
Hard-X-ray-selected active galactic nuclei - I. A radio view at high frequencies, E. Chiaraluce et al. 2020, MNRAS, 495, 4
Hard-X-ray-selected Active Galactic Nuclei – II. Spectral Energy Distributions in the 5-45 GHz domain, F. Panessa et al. 2022, in press