Abstract The origin of the IceCube extragalactic neutrinos remains a puzzle, and it has been argued that sources at large redshifts could be responsible for producing these neutrinos. Recently, a distant blazar at z = 2. 7 was proposed as a promising neutrino emitter. In this study, we perform a comprehensive multi-wavelength analysis of the high-redshift (z = 2. 153) blazar PKS~0446+11, aiming to investigate its potential physical association with the co-spatial IceCube neutrino event IC-240105A. At the time of the neutrino's arrival, PKS~0446+11 was undergoing an unprecedented -ray flare—the most intense recorded over the entire Fermi-LAT operational history. In addition, enhanced fluxes were simultaneously observed across other electromagnetic bands. Taking advantage of the temporal coincidence, Monte Carlo simulations yield a low chance probability (0. 03), suggesting that PKS~0446+11 is a plausible neutrino emitter. This provides further observational support for the hypothesis that relativistic jets from active galactic nuclei in the early Universe are efficient accelerators of ultra-high-energy cosmic rays.
R Chen (Mon,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: