Ultra fast outflows, and their connection to accretion and ejection processes in AGNs

TL;DR

This paper reviews recent findings on ultra fast outflows in AGNs, highlighting their properties, evolution, and significant role in galaxy feedback mechanisms based on X-ray spectral observations.

Contribution

It provides a comprehensive overview of the observational characteristics and implications of ultra fast outflows in AGNs, emphasizing their importance in feedback processes.

Findings

UFOs are high-velocity winds launched from accretion disks.

UFOs evolve after shocks with ambient medium.

UFOs can expel significant mass and energy, influencing galaxy evolution.

Abstract

The growing evidence for energy-conserving outflows in powerful and luminous AGN supports the idea that high-velocity winds launched from the accretion disc evolve systematically after undergoing a shock with the ambient medium and that they are capable to expel enough mass and energy so as to produce feedback. This talk will give an overview of recent results on AGN ultra fast outflows, with focus on grating X-ray spectra of bright sources. I will review how UFO work, their observational properties and their relation with AGN outflows in other bands, what is their impact on the host galaxies and their role in feedback processes.