Illuminating the Active Universe: Multi-Wavelength and Multi-Messenger Insights into AGN

Session

AGN Emission

15 Sept 2026, 14:20

Auditorium Telescopium (ESO)

54. Beyond One-Zone Models: Linking Multi-Wavelength Phenomenology to Acceleration Microphysics in Blazar Jets

Dr Andrea Tramacere (Université de Genève)

15/09/2026, 14:20

Invited

The paradigmatic understanding of the physical processes operating in the relativistic jets of blazars, traditionally framed within one-zone models, has been challenged by recent observational evidence. IXPE multi-wavelength campaigns support multi-zone scenarios; delays between radio and gamma-ray flares point to jet acceleration and propagation effects; and short- and long-term inter-band...

44. Radiative models for rapid AGN flares

Andreas Zech (Observatoire de Paris)

15/09/2026, 14:50

Invited

Rapid variability over a large range of wavelengths is a defining feature of blazars and radio galaxies. The shortest time scales are observed at the highest gamma-ray energies, with significant flux variations over a few days or hours not uncommon, while the most extreme events reach the minute time scale. The origin of the underlying processes is not well known, but most scenarios place the...

9. Multi-scale Outflows in M81: From Sub-parsec to Hundred-parsec Scales

Zongnan Li (Korea Astronomy and Space Science Institute)

15/09/2026, 15:20

Galactic circumnuclear regions, where stars and supermassive black holes interact with the interstellar medium, are crucial for understanding black hole feeding, feedback, and galaxy co-evolution. However, the connection between black hole feedback and the surrounding interstellar medium remains elusive. Using CAHA/PPAK and JWST observations, we investigate multi-scale outflows in the nearest...

56. The multiphase circumnuclear region of Centaurus A as seen with JWST/MIRI MRS observations

Lorenzo Evangelista (Institut d'astrophysique de Paris)

15/09/2026, 15:40

Supermassive black holes power Active Galactic Nuclei (AGN), injecting energy that regulates accretion and shapes host galaxies. We investigate the morphology, excitation, and kinematics of molecular hydrogen (H2) in the inner circumnuclear disk of Centaurus A, the nearest radio galaxy. We present JWST/MIRI MRS integral-field spectroscopy of the central 170x100 pc2 at 0.3"-0.7" (5-12 pc)...

4. JWST/MIRI Observations of the Nuclear Region of NGC 7582

Khushboo Khushboo (European Southern Observatory)

15/09/2026, 16:30

Regular

Obscured active galactic nuclei (AGN) represent a crucial phase of supermassive black hole growth, in which dense circumnuclear dust hides the central engine and reprocesses its radiation into the infrared. Earlier mid-infrared observations with the Spitzer Space Telescope provided key constraints on dusty torus models but lacked the sensitivity and spectral resolution required to reveal...

47. Bridging diagnostics: Multi-wavelength consistency and discrepancy in the classification of local AGN

Helene Kast

15/09/2026, 16:50

Regular

Understanding the interplay between AGN and their host galaxies is central to modern galaxy evolution studies. As we move beyond isolated diagnostics toward a unified, multi-wavelength framework, understanding the reliability and limits of AGN classification methods becomes necessary for interpreting the feedback mechanisms that shape galaxies. We address this challenge by combining optical...

29. The prevalence of radio-excess AGN within the SCUBA-2 detected sample of sub-millimeter sources

Bruno Slaus (Astronomical Observatory Institute, Faculty of Physics and Astronomy, Adam Mickiewicz University, ul. Słoneczna 36, 60-286 Pozna´n, Poland)

15/09/2026, 17:10

flash talk

Since their discovery, due to a very negative K-correction and strong constraints on the evolutionary models, galaxies detected in the sub-millimeter part of the spectrum have remained an important part of understanding galaxy evolution. Physically, they correspond to dusty star-forming galaxies. However, a number of them also host AGNs, as evidenced by a number of previous studies. In this...