Abstract

Contributed Talk - Splinter NonThermalAccel   (MW-1250)

Constraining acceleration and diffusion in blazar jets with multi-messenger data

Xavier Rodrigues, Frank Rieger, Artem Bohdan, and Paolo Padovani
APC, Université Paris-Cité

AGN jets are promising acceleration sites of protons and other nuclei up to ultra-high energies. IceCube and an emerging network of other neutrino observatories are now testing this theoretical expectation. While the widely used one-zone blazar model can reproduce some multi-messenger observations, its simplicity cannot constrain the underlying physics of particle acceleration and transport in the jet. In this talk, I introduce a new AGN jet model extending to the parsec scale, where particle distributions are derived from the evolving turbulent magnetic field and the multi-wavelength and neutrino emission along the jet is estimated with a time-dependent numerical solver. Fitting this model to recent neutrino and multi-wavelength observations of blazars yields new constraints on the acceleration efficiency and diffusion coefficient in the jet. I discuss the impact of these results on the search for the sources of the cosmic neutrinos, and show how upcoming multi-messenger facilities will further constrain the physics of AGN jets.