M. Cappi, F. Tombesi, M. Giustini
Published 2013-01-30Version 1
During the last decade, strong observational evidence has been accumulated for the existence of massive, high velocity winds/outflows (aka Ultra Fast Outflows, UFOs) in nearby AGNs and in more distant quasars. Here we briefly review some of the most recent developments in this field and discuss the relevance of UFOs for both understanding the physics of accretion disk winds in AGNs, and for quantifying the global amount of AGN feedback on the surrounding medium.
Comments: 4 pages, 4 figures, to be published on Mem. SAIt as proceedings of the conference "X-ray Astronomy: the next 50 years" (Milano, 1-5 October 2012), Eds. R. Della Ceca, T. Maccacaro, L. Maraschi, G. Pareschi and G. Trinchieri
The origin of ultra-fast outflows in AGN: Monte-Carlo simulations of the wind in PDS 456
Jet Suppression by Accretion Disk Winds in the Microquasar GRS 1915+105
Dual Role of Accretion Disk Winds as X-ray Obscurers and UV Line Absorbers in AGN
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