TL;DR
This paper reviews different models of AGN feedback mechanisms, comparing theoretical processes with observations to understand their role in galaxy evolution, star formation quenching, and black hole growth.
Contribution
It provides a comprehensive overview of AGN feedback models, analyzing their ability to explain key galaxy evolution phenomena and observational data.
Findings
Different feedback mechanisms have varying effectiveness in expelling gas.
Models can explain the M-sigma relation and star formation quenching.
Some mechanisms may also provide positive feedback to galaxy growth.
Abstract
The physical processes responsible of sweeping up the surrounding gas in the host galaxy of an AGN, and able in some circumstances to expel it from the galaxy, are not yet well known. The various mechanisms are briefly reviewed: quasar or radio modes, either momentum-conserving outflows, energy-conserving outflows, or intermediate. They are confronted to observations, to know whether they can explain the M-sigma relation, quench the star formation or whether they can also provide some positive feedback and how the black hole accretion history is related to that of star formation.
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