Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 75: Eingeladene Vorträge VI
T 75.3: Eingeladener Vortrag
Donnerstag, 28. März 2019, 15:00–15:30, H03
Neutrinos from Blazars - what we learned from the TXS0506+056 observations — •Anatoli Fedynitch1,2, Shan Gao1, Walter Winter1, and Martin Pohl1,3 — 1DESY, Platanenallee 6, 15738 Zeuthen, Germany — 2Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 — 3Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam, Germany
Blazars such as TXS0506+056 are collimated relativistic outflows from active galactic nuclei and among the brightest persistent radiation sources in the universe. The recent detection with the IceCube Observatory of a very-high-energy neutrino from TXS0506+056 in coincidence with a multi-wavelength flare supports the hypothesis that blazars accelerate cosmic rays beyond PeV energies, challenging conventional theoretical models. At the same time, the identification of a neutrino burst from the same source in archival IceCube data challenges most of the existing models and raises concerns about our theoretical understanding of these objects. In this talk I will highlight the relevant blazar models in the context of multi-messenger emission and highlight how the observational cornerstones of the TXS0506+056 discovery constrain their viability and generalization.