Speaker
Description
Despite significant strides in numerical and theoretical understanding, the active galactic nucleus (AGN) jet structure is still an open question. Relativistic magnetohydrodynamical (RMHD) simulations are indispensable tools for probing the dynamics and emission of these astrophysical sources. Recent attention has shifted towards investigating instabilities downstream of recollimation shocks, mainly through 3D simulations, revealing their complex dynamics and impact on jet structures. Furthermore, turbulence downstream of strong recollimation shocks facilitates particle acceleration to higher energies, potentially explaining extreme phenomena observed in high-energy peaked blazars. However, the suppression of instabilities by intense magnetic fields remains a topic of ongoing research, with implications for understanding sources like extreme blazars. This work explores various instabilities downstream of recollimation shocks in AGN jets. We employ preliminary high-resolution MHD 2D and 3D simulations to pave the way for comprehensive RMHD simulations using the PLUTO code. Our results aim to elucidate the spectral energy distribution, intensity, and polarization of non-thermal emission, contributing to a deeper understanding of AGN jet dynamics.
