High-Energy Neutrinos from Blazar Flares and Implications of TXS 0506+056

¹ European Southern Observatory, Karl-Schwarzschild-Str. 2, Garching bei München D-85748, Germany
² Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA
³ Department of Astronomy & Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA
⁴ Center for Particle and Gravitational Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA
⁵ Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan
⁶ Department of Astrophysical Sciences, Princeton University, New Jersey 08544, USA

^* presenter, e-mail: foikonom@eso.org
^** e-mail: murase@psu.edu
^*** e-mail: m.petropoulou@astro.princeton.edu

Published online: 17 May 2019

Abstract

Motivated by the observation of a > 290 TeV muon neutrino by IceCube, coincident with a ~6 month-long γ-ray flare of the blazar TXS 0506+056, and an archival search which revealed 13 ± 5 further, lower-energy neutrinos in the direction of the source in 2014-2015 we discuss the likely contribution of blazars to the diffuse high-energy neutrino intensity, the implications for neutrino emission from TXS 0506+056 based on multi-wavelength observations of the source, and a multi-zone model that allows for sufficient neutrino emission so as to reconcile the multi-wavelength cascade constraints with the neutrino emission seen by IceCube in the direction of TXS 0506+056.