Splinter Meeting Multimessenger

The Physics behind the Multimessenger Emissions of Active Galactic Nuclei

Time: Thursday September 12, 14:00-15:45 and 16:15-18:00 and Friday September 13, 14:00-15:45 and 16:15-18:00 CEST (UTC+2)

Room: S25

Convenor(s): Prof. Dr. Anna Franckowiak [1], Prof. Dr. Ralf-Jürgen Dettmar [1], Dr. Dominik Elsässer [2], Dr. Christoph Wendel [3], Dr. Eva Jütte [1], Dr. Kevin Schmidt [2]
[1] Ruhr-Universität Bochum, [2] Technische Universität Dortmund, [3] Julius-Maximilians-Universität Würzburg

Active galactic nuclei (AGN) are key objects both for astroparticle physics and for astronomy. These most luminous persistent astrophysical engines known convert the gravitational and rotational energy of accreted matter into kinetic energy of particles. These thermal and non-thermal particle populations are producing electromagnetic radiation, neutrinos and cosmic rays. Multimessenger studies are the perfect approach towards a full understanding of these processes. Within the gravitational impact of the central supermassive black hole of a galaxy, accretion flows with surrounding coronae form. The associated thermal and non-thermal processes can outshine the entire host galaxy, if not obscured by a circumnuclear molecular torus. Via the extraction of angular momentum from the magnetised accretion flow and/or from the spinning black hole via electromagnetic stress, elementary particles and/or Poynting flux can be channelled out along the rotational axis, such that relativistic jets evolve. During the jet propagation along distances of up to several Mpc, leptonic or lepto-hadronic cascading and re-acceleration happens and modifies the particle content and the spectral characteristics of the jet emission, until the outflow feedbacks on the intra-cluster medium. The messengers from distant AGN travel along many hundreds of Mpc and can thereby interact with the extra-galactic background light and the inter-galactic magnetic field. Spatial, temporal or spectral signatures can thus be used to probe fundamental physics, like the origin of inter-galactic magnetic fields, star-formation history or dark-matter candidates. This splinter session comprises all aspects of this research field at the cross-roads of astronomy and astroparticle physics. We invite reports that yield insight about the physical properties, interaction mechanisms and evolution of AGN as well as about how AGN influence and shape their environment.

Program

Thursday September 12, 14:00-15:45 The Physics behind the Multimessenger Emissions of Active Galactic Nuclei (S25)

Thursday September 12, 16:15-18:00 The Physics behind the Multimessenger Emissions of Active Galactic Nuclei (S25)

Friday September 13, 14:00-15:45 The Physics behind the Multimessenger Emissions of Active Galactic Nuclei (S25)

Friday September 13, 16:15-18:00 The Physics behind the Multimessenger Emissions of Active Galactic Nuclei (S25)

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