Radio source evolution and the interplay with the host galaxy

Abstract

There is compelling evidence showing that extragalactic jets are a crucial ingredient in the evolution of host galaxies and their environments. Extragalactic jets are well collimated and relativistic, both in terms of thermodynamics and kinematics at sub-parsec and parsec scales. They generate strong shocks in the ambient medium, associated with observed hotspots in FRII radio galaxies, and carve cavities that are filled with the shocked jet flow, dragging a large fraction of the interstellar gas along, in the form of slow, massive outflows within the host galaxies. In this paper, I discuss relevant processes associated to jet evolution in the frame of FRI-FRII dichotomy. In particular, I focus on the role of 1) the interaction between galactic atmospheres and the jet head on global FRII jet kinematics, and 2) mass load by stellar winds or small-scale instabilities on jet deceleration in FRI jets. The results presented are based on 3D relativistic hydrodynamical (RHD) and/or 2D axisymmetric, time-independent relativistic magnetohydrodynamical (RMHD) simulations.

Dissipative Processes and Their Role in the Evolution of Radio Galaxies

“…After the initial injection carves its way through the irregular inner galactic ambient medium, a channel forms that allows the particles to propagate at relativistic speeds along it. The CDI and KHI are assumed to develop at different scales along the jet, with the former acting while the jet is magnetically dominated and the KHI [164]). Note that where case 1 is indicated, the jet evolution can be non-adiabatic [27].…”

“…I have indicated the possible evolutionary options related to mass load in blue. Adapted from Perucho et al, in preparation (see also[164]). Note that where case 1 is indicated, the jet evolution can be non-adiabatic[27].…”

Radio Galaxies at TeV Energies

“…When following the diagram, it has to be kept in mind that different processes can take place at the same time. [164]). Please note that where case 1 is indicated, the jet evolution can be non-adiabatic [27].…”

“…I have indicated the possible evolutionary options related to mass load in blue. Adapted from Perucho et al, in preparation (see also[164]). Please note that where case 1 is indicated, the jet evolution can be non-adiabatic[27].…”