The many facets of fuelling and feedback in jetted AGN

10-15th September 2023, Tropea, Italy

Workshop Overview

Relativistic radio-emitting jets associated with active galactic nuclei (AGN) likely play a crucial role in the evolution of galaxies. By transferring a fraction of their kinetic energy to the surrounding medium (the so-called “kinetic-mode” AGN feedback), radio jets can both quench (negative feedback) and promote (positive feedback) star formation, thus regulating the growth of both central supermassive black holes (SMBHs) and their host galaxies. One of the most spectacular phenomena associated with relativistic jets is indeed the creation of cavities and shocks in the hot X-ray-emitting atmospheres of galaxies, groups, and clusters, providing the most striking evidence that expanding radio jets can heat the surroundings, balancing its spontaneous radiative cooling losses. 

Complementing earlier high-resolution radio, optical, and X-ray instruments (e.g. VLA, HST, Chandra, XMM-Newton), the unprecedented resolution and sensitivity provided by the latest generation of telescopes (e.g. VLT/MUSE, ALMA and the SKA precursors/pathfinders) combined with state-of-the-art simulations, have opened up new regimes that have started revolutionising our view of the interplay between the radio jets and their surrounding medium. For instance, evidence has been accumulated over the past few years that jet-mode feedback can significantly alter the distribution, kinematics, and physics of the surrounding gaseous medium also on (sub-)kpc scales, with a few examples starting to appear at high redshift as well. Recent observations also suggest that jetted AGN may be self-regulated by a feeding and feedback loop, in which the matter that fuels the SMBH and triggers the jet activity gets regularly heated by these latter and stops being accreted, setting-up a cycle that is fast compared to the evolutionary timescales of the host galaxies. All this provides clear evidence of a deep connection between the large-scale environment, fuelling/feedback processes of jetted AGN and their host galaxy evolution, although the complexity of these phenomena still leave many open questions. 

With the advent of next-generation telescopes (e.g. JWST, SKA, Athena), we are at the brink of an exciting new era of discoveries in terms of jetted AGN physics, including their role in the high-redshift universe, which will surely translate to a broader understanding of galaxy evolution across cosmic times. The aim of this workshop is to summarise and discuss our state of knowledge on this topic. We will focus on the results obtained from the wealth of multi-wavelength observations acquired over the past few years, including complementary theoretical understanding, and look towards future perspectives in the context of forthcoming facilities. In particular, we aim to address the following scientific topics:

Confirmed invited speakers

Meeting Format

The workshop will be hosted at the historic Palazzo Santa Chiara in the centre of Tropea, with three full days and two half-days of scientific presentations and discussions. A broad range of social activities will be also offered, including a welcome reception on Sunday 10th September, the social dinner on Tuesday 12th September, a choice of half-day excursions (either by land or by sea) on Wednesday 13th September, and an aperitif on the beach on Thursday 14th September.

Due to the limited capaticy of the venue, the workshop is restricted to about 80 attendees. We aim to make the workshop a safe space for all, and as such the meeting will have a Code of Conduct. Registering for the meeting signifies that you agree to abide by this code of conduct, and accept the sanctions within it may apply if you break it.

The organisers are monitoring the ongoing situation surrounding coronavirus, and will update the website with further information on the requirements regarding this as the workshop comes nearer.

Registration and Abstract submission

Abstract submission is now closed, and participants should have recieved communications from us with the outcome of their application. Registration for accepted participants is now closed.

The regular registration fee is 200 euros, and we offer a 50% reduced fee for students. A small number (5/6) of mini grants of about 300 euros are also available upon request for participants (at any career stage) with very limited travel budget. Fee payments are now open via CST Tropea, and registered participants should have received the relative instructions. We note that the registration fee covers use of the venue, the costs of the welcome reception, coffee breaks, conference dinner, and the dedicated bus transfers to/from the Lamezia Terme airport.

The scientific programme has been chosen based on submitted abstracts. Full details can be found here. The expectation is that conference speakers will deliver their talks in person. Remote talks will be considered only under exceptional circumstances.

Note that Tropea is a very popular tourist destination over the summer. We thus recommend that interested participants plan their trip well in advance and reserve accomodation as soon as possible. A number of hotels in (or close to) the town centre offer special fares for workshop participants - full details can be found here.


The official poster for the workshop (designed by Maximilian Baker) is avaliable to download here.

Review Volume

A special issue of the journal “Galaxies” focused on the topic of the workshop is now open for submission. This Volume is intended to provide an overview on the topic, collecting a small number of selected mini-reviews (of about 10 pages each). Attendees who would like to be selected for such a contribution are invited to contact the two co-editors of the Volume, Isabella Prandoni ( and Ilaria Ruffa (

Important dates

  • March 14th, 2023 - Participants informed
  • January 20th, 2023 - Abstract submission opens
  • March 20th, 2023 - Abstract submission deadline
  • May 15th, 2023 - Participants informed
  • May 22nd, 2023 - Registration opens
  • June 9th, 2023 - Registration closes
  • July 19th, 2023 - Full program avaliable
  • September 11-15, 2023 - Meeting

  • SOC


    • Ilaria Ruffa (Cardiff University, chair)*
    • Marisa Brienza (INAF-OAS)
    • Timothy Davis (Cardiff University)
    • Fabrizio Fiore (INAF-OAT)
    • Robert Laing (SKAO)
    • Filippo Maccagni (ASTRON)
    • Nicole Nesvadba (OCA)*
    • Isabella Prandoni (INAF-IRA)
    • Stanislav Shabala (UTAS)
    • Pasquale Temi (NASA-ARC)
    • Ilaria Ruffa (Cardiff University, chair)
    • Anelise Audibert (IAC)
    • Marisa Brienza (INAF-OAS)
    • Timothy Davis (Cardiff University)
    • Quirino D'Amato (SISSA)
    • Jacob Elford (Cardiff University)
    • Ana Jimenez-Gallardo (University of Bologna)
    • Filippo Maccagni (ASTRON)
    • Isabella Prandoni (INAF-IRA)

    Stars (*) denote designated points of contact for all matters related to the code of conduct. If you need to contact us about the conference please email

    The AGN on the Beach team thank Holly Davies for logo design. The conference is put on with the support of: