How young relativistic jets from AGNs impact galaxy evolution

 Feedback from the central super-massive blackhole back into the ambient gas in the form of winds and jets are an important ingredient in the evolutionary history of galaxies. Without such feedback processes, runaway star formation results in larger number count of massive galaxies than what is observed. The feedback processes occur over different spatial and temporal scales, and at different epochs of the galaxy's history. Through recent simulations we have probed the effect of one such phase of feedback, namely young relativistic jets, trapped within the galaxy's potential before they break out to larger scales. We investigate how such young jets, frustrated by the dense ISM, strongly interact with the ambient gas, shocking it and increasing the turbulence. The nature of interaction depends on jet power, density of the interstellar medium and the morphology of the gas. Such interactions can both potentially quench star formation by generating outflows and turbulence, or promote star formation by compressing gas clouds. I will discuss the implications of our results on the evolutionary history of the galaxy and also predict observable signatures predicted from our simulations, which show good match with existing observational results and more recent studies of jet-ISM interaction via emission line diagnostics.