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AGN fueling and feedback

Published online by Cambridge University Press:  29 January 2021

Francoise Combes
Francoise Combes*
Affiliation:
Observatoire de Paris, LERMA, Collège de France, CNRS, PSL University, Sorbonne University, UPMC, Paris email: [email protected]
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Abstract

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Dynamical mechanisms are essential to exchange angular momentum in galaxies, drive the gas to the center, and fuel the central super-massive black holes. While at 100pc scale, the gas is sometimes stalled in nuclear rings, recent observations reaching ∼10pc scale have revealed, within the sphere of influence of the black hole, smoking gun evidence of fueling. Observations of AGN feedback are described, together with the suspected responsible mechanisms. Molecular outflows are frequently detected in active galaxies with ALMA and NOEMA, with loading factors between 1 and 5. When driven by AGN with escape velocity, these outflows are therefore a clear way to moderate or suppress star formation. Molecular disks, or tori, are detected at 10pc-scale, kinematically decoupled from their host disk, with random orientation. They can be used to measure the black hole mass.

Keywords

galaxies: activegalaxies: generalgalaxies: nucleigalaxies: Seyfertgalaxies: spiral
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 177 - 183
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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