---
author:
- 'N. P. H. Nesvadba, C. De Breuck, M. D. Lehnert, P. N. Best, and C. Collet'
bibliography:
- 'hzrg.bib'
date: 'Received / Accepted '
title: 'The SINFONI survey of powerful radio galaxies at z$\sim$2: Jet-driven AGN feedback during the Quasar Era [^1]'
---

Introduction {#sec:introduction}
============

Substantial observational and theoretical progress in the last decade has left little doubt that the supermassive black holes that seem to be nearly ubiquitous in the nuclei of galaxies play a significant role in shaping the properties of their host galaxies. @silk98 recognized that the energy output of active galactic nuclei, in spite of their short lifetimes of only a few $10^{7}$ yrs, is sufficient to unbind most of the interstellar gas even in very massive, gas-rich host galaxies, if this energy can be efficiently injected into the interstellar medium. The details of this mechanism are still relatively poorly understood. Observations have provided evidence that outflows can be seen in galaxies with bolometrically luminous AGN as well as AGN that are dominated by the radio jets produced by narrow beams of relativistic, synchrotron emitting particles.

Of particular interest is the role of powerful AGN in the early evolution of massive galaxies 