"Feedback from Active Black Holes: How a central black hole can control a galaxy"
All large galaxies appear to have a central black hole with a mass about 0.1% that of the host galaxy. Evidence is growing that the black hole may be the prime mover here, despite the radius of the galaxy being a billion times larger than the radius of the black hole.
The key is the enormous quantity of energy produced by matter falling onto the black hole. This can make the black hole active and cause energy to be fed back into the galaxy to push and heat its gas clouds.
Professor Andrew Fabian is a Royal Society Research Professor at the Institute of Astronomy, Cambridge. He has served as President of the Royal Astronomical Society and is Vice Master of Darwin College, Cambridge. He is a Fellow of the Royal Society, has been awarded an Order of the British Empire, won the Rossi Prize in 2001, and the Dannie Heineman Prize in 2008. His research interests include black holes, clusters of galaxies, and X-ray astronomy.