Galaxy-scale AGN feedback - theory

Powerful relativistic jets in radio galaxies are capable of driving strong outflows but also inducing star‐formation by pressure‐triggering collapse of dense clouds. We review theoretical work on negative and positive active galactic nuclei feedback, discussing insights gained from recent hydrodynam...

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Bibliographic Details
Published in:Astronomische Nachrichten 2016-02, Vol.337 (1-2), p.167-174
Main Authors: Wagner, A. Y., Bicknell, G. V., Umemura, M., Sutherland, R. S., Silk, J.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astrophysics
Clouds
Feedback
Galaxies
galaxies: active
galaxies: evolution
galaxies: jets
hydrodynamics
Interstellar matter
Negative feedback
Positive feedback
Radio astronomy
Simulation
Star & galaxy formation
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Summary:Powerful relativistic jets in radio galaxies are capable of driving strong outflows but also inducing star‐formation by pressure‐triggering collapse of dense clouds. We review theoretical work on negative and positive active galactic nuclei feedback, discussing insights gained from recent hydrodynamical simulations of jet‐driven feedback on galaxy scales that are applicable to compact radio sources. The simulations show that the efficiency of feedback and the relative importance of negative and positive feedback depend strongly on interstellar medium properties, especially the column depth and spatial distribution of clouds. Negative feedback is most effective if clouds are distributed spherically and individual clouds have small column depths, while positive feedback is most effective if clouds are predominantly in a disc‐like configuration. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201512287