Speaker
Description
IceCube observations of the Seyfert galaxy NGC 1068 have provided evidence for high-energy neutrino emission, raising the possibility that active galactic nucleus (AGN) coronae may serve as sites of cosmic-ray acceleration and neutrino production. High-energy protons accelerated in the corona can interact with the intense radiation field to produce neutrinos, while relativistic electrons in the coronal environment may contribute to millimeter emission through synchrotron radiation. In this study, we use multi-frequency ALMA observations of the Seyfert 1 galaxy NGC 7469 to construct its nuclear millimeter spectral energy distribution and investigate the structure and physical conditions of the corona by examining the spectral shape, synchrotron self-absorption, and possible thermal emission components. Our goal is to explore how the millimeter-emitting region is connected to a coronal environment capable of accelerating high-energy particles and producing neutrinos.