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Jet feedback from active galactic nuclei (AGN) harboured by brightest clustergalaxies is expected to play a fundamental role in regulating cooling in theintracluster medium (ICM). While observations and theory suggest energy withinjet lobes balances ICM radiative losses, the modus operandi of energycommunication with the ICM remains unclear. We present simulations of very highresolution AGN-driven jets launching in a live, cosmological galaxy cluster,within the moving mesh code AREPO. As the jet propagates through the ICM themajority of its energy, which is initially in the kinetic form, thermalizesquickly through internal shocks and inflates lobes of very hot gas. The jetseffectively heat the cluster core, with $PdV$ work and weather-aided mixingbeing the main channels of energy transfer from the lobes to the ICM, whilestrong shocks and turbulence are subdominant. We additionally present detailedmock X-ray maps at different stages of evolution, revealing clear cavitiessurrounded by X-ray bright rims, with lobes being detectable for up to $\sim10^8$ yr even when magnetic draping is ineffective. We find bulk motions in thecluster can significantly affect lobe propagation, offsetting them from the jetdirection and imparting bulk velocities that can dominate over the buoyantlyrising motion.

AGN jet feedback on a moving mesh: lobe energetics and X-ray properties in a realistic cluster environment