AGN outflows & feedback

Roughly twenty years ago, two seminal papers proposed the idea that the energy radiated away from an active galactic nucleus (AGN) can, if efficiently coupled with the interstellar medium of its host galaxy, heat up and/or remove its cold gas reservoirs and therefore effectively halt the formation of new stars. Since then, a lot of effort has been made to quantify the importance of this AGN feedback for galaxy evolution, both observationally and theoretically. Contradicting results mean that the jury is still out. This collection and the corresponding Nature Astronomy focus issue on AGN outflows and feedback bring together newly commissioned content and original scientific research that try to elucidate our current understanding of AGN feedback.

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