A inhomogenous jet model for the broad band emission of radio loud AGNs

Abstract

We propose a coherent jet model for radio loud AGNs. This model is based on the assumption that the jet is composed of two flows: an external MHD plasma, surrounding an internal highly relativistic plasma of electron-positrons. The leptons present in the spine, responsible of most of the emission, are supposed to be continuously heated via diffuse acceleration along the jet. The model is thus naturally inhomogeneous and includes most of the expected electromagnetic processes in radio loud sources: synchrotron, self-synchrotron Compton and external Compton emission (with Klein-Nishina cross section) on external sources (accretion disk, dusty torus and broad line region), photon-photon absorption and pair creation. A key point of the model is that the jet bulk Lorentz factor is not a free parameter but is the result of the Compton rocket effect and is thus imposed by external sources, themselves constrained by observation.The particles energy distribution is computed coherently along the jet applying energy conservation between heating and cooling and flux conservation, and the emerging spectrum is computed numerically. This model is applied to the quasar 3C273 and successfully reproduces its broad band emission over 15 orders of magnitude.

ICRC Rapporteur: Space Based Gamma-ray Astronomy

“…Other examples of using multiwavelength information were presented including monitoring of NGC 1275 [4], looking for correlations [5], and modeling efforts such as [6,7,8]. None of these could be successful without understanding the full context of the SED provided by multiple instruments.…”

“…[55] presented EDGE 5 , a diffusion and emission simulations package. [56] detailed an analysis package designed to aid in the analysis of Fermi-LAT data called fermipy 6 . [57] showed two posters: one on a Baysian Kalman filter [57] and one on an event generator for telescopes like e-ASTROGRAM 7 [58].…”