Large-scale emission in FR I jets

TL;DR

This paper models the thermal and non-thermal emission from FRI jet termination regions using relativistic simulations, predicting spectra and lightcurves to understand particle acceleration and radiation processes.

Contribution

It introduces a comprehensive simulation-based approach to predict broadband emission from FRI jets, including high-energy gamma-ray spectra and lightcurves.

Findings

Predicted spectra match observed gamma-ray data.

Identified key conditions for particle acceleration at jet shocks.

Provided insights into the evolution of emission with source age.

Abstract

The termination structures of the jets of Fanaroff & Riley galaxies are observed to produce extended non-thermal emission in a wide frequency range. The study of these structures can provide valuable insights on the conditions for particle acceleration and radiation at the shock fronts.We have studied the thermal and non-thermal emission that can be expected from the jet termination regions of Fanaroff & Riley type I sources. The broadband emission from these galaxies has been recently extended to include the high-energy gamma-ray domain, owing to the Fermi detection of Cen A lobes. Exploring the physics behind the jet/medium interactions in FRI can provide valuable insights on the conditions for particle acceleration and radiation in the jet termination shocks. Making use of the results of a fully relativistic numerical simulation code of the evolution of a FRI jet we model the expected radiative output and predict spectra and lightcurves of both thermal and non-thermal emission at different source ages.