Neutrinos from Blazars – what we learned from the TXS0506+056 observations

by Anatoli Fedynitch (DESY, Zeuthen)

Wednesday 12 Dec 2018, 15:00 → 16:00 Europe/Rome

Ex-ISEF/Building-Library (GSSI)

Abstract: 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. The identification of a neutrino burst in archival IceCube data challenges all of the existing models and raises concerns about our theoretical understanding of these objects. In this seminar I aim to explain the common blazar models in the context multi-messenger emission and highlight how the observational cornerstones of the TXS case constrain their viability and generalization.

TXS_fedynitch_GSSI.pdf