Fermi Gamma-ray Space Telescope

Flaring Sources and the Diffuse High-Energy Cosmic Neutrino Flux

Ali Kheirandish
(Francis Halzen)


For the first time since the discovery of high-energy cosmic neutrinos in IceCube, a distant gamma ray blazar was identified as a high-energy neutrino source. The extraordinary brightness of the source despite its distance suggests that it may belong to a special class of sources that produce cosmic rays. Moreover, the high-energy neutrino flux from the source is dominated by a neutrino burst, which implies flaring sources strongly contribute to the cosmic ray flux. In this talk, we investigate the contribution of a subclass of flaring blazars to the high-energy neutrino flux and speculate on its connection to the very high energy cosmic ray observations.