IAU Symposium Abstract S186-094T


The Fueling of AGN at High and Low Redshifts


E.S. Phinney1
1 California Institute of Technology, Pasadena, CA, 91125, USA esp@tapir.caltech.edu



During its lifetime a quasar accretes as much gas as the Milky Way now contains in its inner kiloparsec. The central puzzle at high redshifts is how to quickly form supermassive black holes surrounded by gas enriched in heavy elements. The central puzzle at low redshifts is how to transfer, intermittently, gas remaining at large radii (or perhaps stars) to a nuclear accretion disk. We review recent progress in solving these puzzles, emphasizing nuclear star formation, disk warps, gravitational torques and resonant perturbations.