PRAiSE: resolved spectral evolution in simulated radio sources

ABSTRACT We present a method for applying spatially resolved adiabatic and radiative loss processes to synthetic radio emission from hydrodynamic simulations of sources active galactic nuclei (AGNs). Lagrangian tracer particles, each representing an ensemble electrons, are injected into the position, grid pressure, time since last strong shock recorded. These quantities used track losses electron packet through source in manner similar Radio AGN Semi-analytic Environments formalism, which uses global properties calculate emissivity particle ex situ. Freedom choice observing parameters, including redshift, is provided post-processing nature this approach. apply framework jets different environments, asymmetric ones. find dependence on frequency good agreement with observations previous modelling work. There evolution spectra redshift due more prominent inverse-Compton at high redshift. denser environments have flatter spectral indices, suggesting that index asymmetry may be useful environment tracer. simulate intermediate Mach number disrupt before reaching tip lobe, these retain edge-brightened Fanaroff–Riley Type II morphology, most remaining near lobes all redshifts we study.