Black hole “feedback” is the positive or negative effect of the radiation and kinetic energy dumped by an accreting black hole, an Active Galactic Nucleus or AGN, on the galaxy hosting it. The radiation and outflows couple to the gas influencing its (thermo)dynamics.
AGN feedback is often invoked as a way to regulate star formation and eventually galaxy growth. It must also be realized how AGN feedback regulates black hole growth. The energy and momentum released from the black hole itself affects how gas flows.
We study AGN feedback to understand how black holes grow in galaxies.
Some black holes produce relativistic, collimated jets that pierce into the galaxy and “stir” the gas around them.