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We present VLT/SINFONI imaging spectroscopy of the warm ionized gas in 33powerful radio galaxies at redshifts z>~2, which are excellent sites to studythe interplay of rapidly accreting active galactic nuclei and the interstellarmedium of the host galaxy in the very late formation stages of massivegalaxies. Our targets span two orders of magnitude in radio size (2-400 kpc)and kinetic jet energy (a few 10^46 to almost 10^48 erg s^-1). All sources havecomplex gas kinematics with broad line widths up to ~1300 km s^-1. About halfhave bipolar velocity fields with offsets up to 1500 km s^-1 and are consistentwith global back-to-back outflows. The others have complex velocitydistributions, often with multiple abrupt velocity jumps far from the nucleusof the galaxy, and are not associated with a major merger in any obvious way.We present several empirical constraints that show why gas kinematics and radiojets seem to be physically related. The gas kinetic energy from large scalebulk and local outflow or turbulent motion corresponds to a few 10^-3 to 10^-2of the kinetic energy of the jet. In galaxies with jet power >~10^47 erg s^-1,the bulk kinetic energy dominates the total energy budget of the gas,suggesting that the outflows encompasses the global interstellar medium,perhaps facilitated by the strong gas turbulence. We compare with recenthydrodynamic simulations, and discuss the potential consequences for thesubsequent evolution of massive high-z galaxies. The gas-phase metallicities inour galaxies are lower than in most low-z AGN, but nonetheless solar or evensuper-solar, suggesting that the ISM in these galaxies is very similar to thegas from which massive low-redshift galaxies formed most of their gas. Thisfurther highlights that we are seeing these galaxies near the end of theiractive formation phase.

The SINFONI survey of powerful radio galaxies at z~2: Jet-driven AGN feedback during the Quasar Era