Outflows, Bubbles, and the Role of the Radio Jet: Direct Evidence for AGN Feedback at z~2

Nicole P. H. Nesvadba; Matt D. Lehnert

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arXiv · 0810.2624

Outflows, Bubbles, and the Role of the Radio Jet: Direct Evidence for AGN Feedback at z~2

Nicole P. H. Nesvadba·Matt D. Lehnert

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Abstract

To accommodate the seemingly "anti-hierarchical" properties of galaxies near the upper end of the mass function within our hierarchical paradigm, current models of galaxy evolution postulate a phase of vigorous AGN feedback at high redshift, which effectively terminates star formation by quenching the supply of cold gas. Using the SINFONI IFU on the VLT, we identified kpc-sized outflows of ionized gas in z~2-3 radio galaxies, which have the expected signatures of being powerful AGN-driven winds with the potential of terminating star formation in the massive host galaxies. The bipolar outflows contain up to few x 10^10 M_sun in ionized gas with velocities near the escape velocity of a massive galaxy. Kinetic energies are equivalent to ~0.2% of the rest mass of the supermassive black hole. We discuss the results of this on-going study and the global impact of the observed outflows.

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Nicole P. H. Nesvadba, Matt D. Lehnert. 2008-10-15. Outflows, Bubbles, and the Role of the Radio Jet: Direct Evidence for AGN Feedback at z~2. https://arxiv.org/abs/0810.2624

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