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29.09.2023 / 10:10 / Zeuthen, Villa SR5
Astroparticle SeminarRadio-bright blazars as the origin of high-energy neutrino
Yuri Y. Kovalev | MPIfR, Bonn
The IceCube neutrino telescope has revealed that neutrinos with energies as high as PeV are produced in deep space. These elusive particles are crucial to understanding cosmic accelerators of protons. In this talk we will present results from a joint statistical analysis of radio observations of blazars and neutrino detections from IceCube supplemented by ANTARES and Baikal-GVD. Our findings provide 4sigma-significant observational evidence that high-energy neutrinos are generated in radio-bright blazars and arrive preferentially during their flares. This confirms that AGN cores can accelerate protons to relativistic energies. Very Long Baseline Interferometry is found to be an effective method for selecting active galaxies with jets whose electromagnetic and neutrino emissions are strongly boosted towards an observer. We discuss specific questions related to parsec-scale properties of blazar jets and the physics of neutrino production to explore the nature of blazars as powerful proton accelerators.
More Information: https://confluence.desy.de/display/DESYAstroparticlePublic/Astroparticle+Seminar
