High-Energy Neutrinos from Active Galactic Nuclei
Kohta Murase, F. W. Stecker
Abstract
Active Galactic Nuclei (AGN) are sources of high-energy γ-rays and are considered to be promising candidates to be sources of high-energy cosmic rays and neutrinos as well.We present and discuss various models for ion acceleration and their interactions with matter and radiation leading to high-energy neutrino production.We consider neutrino production mechanisms in both jet-loud and jet-quiet AGN, focusing on disks and coronae in the vicinity of the central black hole, jet regions, and magnetized environments surrounding the AGN.The Ice-Cube Collaboration has reported high-energy neutrino events that may come from both the jet-loud AGN TXS 0506+056 and the jet-quiet AGN NGC 1068.We discuss the implications of these observations themselves as well as the the origins of the all-sky neutrino intensity.