HIGH-ENERGY NEUTRINOS FROM QUASARS

We review and clarify the assumptions of our basic model for neutrino production in the cores of quasars, as well as those modifications to the model made subsequently by other workers. We also present a revise d estimate of the neutrino background flux and spectrum obtained using more recent empirical studies of quasars and their evolution. We comp are our results with other theoretical calculations and experimental u pper limits on the AGN neutrino background flux. We also estimate poss ible neutrino fluxes from the jets of blazars detected recently by the EGRET experiment on the Compton Gamma Ray Observatory. We discuss the theoretical implications of these estimates.