Impact of Inverse Compton Scattering on X-ray Emissions from AGN Jets in the Early Universe.

Active Galactic Nuclei (AGN) play a pivotal role in galaxy evolution through feedback mechanisms driven by relativistic jets. At high redshifts, these jets are believed to generate significant X-ray emissions through inverse Compton scattering of Cosmic Microwave Background (IC/CMB) photons. This mechanism gains importance as the CMB photon density increases with redshift, potentially explaining the X-ray dominance of AGN jets in the early universe. Understanding this process is crucial for uncovering the influence of AGN feedback on the interstellar medium and the broader evolution of galaxies. We investigate the role of IC/CMB in enhancing X-ray emissions in jet lobes and explore trends in these enhancements across different redshifts. Using the relativistic magnetohydrodynamic (RMHD) module of the PLUTO code, we performed 3D RMHD simulations using the hybrid Eulerian-Lagrangian framework of the PLUTO code, accounting for newly developed IC/CMB radiation module to study the effects of the CMB radiation density at different redshifts. This newly developed radiation module has also been tested and verified with standard one-zone modelling codes like AGNPY. In this presentation, I will present the results of 3D RMHD jet simulations under diverse conditions, varying ambient density, jet power, and redshift. Our findings demonstrate variations in X-ray emissions due to IC/CMB across different jet length scales, highlighting the intricate relationship between AGN jets and IC/CMB interactions.