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

Session

AGN Jets

16 Sept 2026, 11:10

Auditorium Telescopium (ESO)

67. Uniting optical, gamma-ray, and neutrino data a decade after the first neutrino blazar

Dr Xavier Rodrigues (European Southern Observatory)

16/09/2026, 11:10

Invited

For the past decade, the IceCube South Pole observatory has revealed indications of high-energy neutrino emission from blazars, powerful black-hole jets aligned with our line of sight. This supports the theoretical expectation that relativistic jets are efficient hadronic accelerators. However, neutrino data face limited statistics, and state-of-the-art source models suffer from critical...

26. From Gamma-Ray Absorption Features to Neutrinos: Tracing the Environments of BL Lac Objects

Luca Foffano (INAF Rome (IAPS))

16/09/2026, 11:40

flash talk

The identification of environmental large-scale structures in active galactic nuclei typically relies on the analysis of absorption and emission lines in their optical spectrum. In BL Lac objects, however, the dominant non-thermal jet emission obscures thermal signatures, making such detections challenging.
Despite this complexity, these environmental photon fields may interact with gamma...

46. Multi-messenger emission from AGN jets: Bridging relativistic simulations and observational signatures.

Harshita Bhuyan (Max Planck Institute for Astronomy Heidelberg, Indian Institute of Technology Indore)

16/09/2026, 12:00

Regular

Active Galactic Nuclei (AGN) and their relativistic jets are among the most energetic astrophysical systems, serving as promising sites for particle acceleration and multi-messenger emission. Despite decades of study, the matter composition of AGN jets remains an open question. The particles inside an AGN jet can be accelerated to high energies via different mechanisms, including shocks,...

36. High Energy Particle Acceleration in Shearing Flows

Frank Rieger (IPP)

16/09/2026, 12:20

Regular

Stochastic Fermi-type particle acceleration has emerged as a compelling mechanism for the efficient energization of particles in supermassive black hole systems. I will discuss recent advances, and exemplarily highlight: (i) the role of shear acceleration in sustaining ultra-relativistic electrons and protons in large-scale jets such as in Centaurus A, (ii) its implications for the production...