Magnetically Powered Blazar Jets Emission and Multi-Messenger Relevance

Blazars, a subclass of active galactic nuclei, are characterized by relativistic jets that are closely aligned with our line of sight. This results in relativistic beaming, making blazars among the most luminous extragalactic sources across the electromagnetic spectrum, from radio waves to gamma rays and, potentially, in highenergy neutrinos. As the jets propagate outward, the magnetic reconnection process can convert this electromagnetic energy into kinetic energy of particles. This process accelerates particles to high energies. Building upon the reconnection-powered lepto-hadronic scenario proposed by Petropoulou et al. (2023), we have developed a distance-dependent radiative framework that couples ideal magnetohydrodynamic jet acceleration with localized magnetic reconnection sites. This model self-consistently tracks the evolution of jet properties, including the bulk Lorentz factor, magnetization, jet geometry, and the properties of nonthermal particles, from the jet base to parsec scales. Additionally, it accounts for the spatially varying external photon fields originating from the accretion disk and the broad-line region.