Abstract. Supermassive black holes in
obey a surprisingly large number of scaling laws that involve the black hole
mass and various properties of the host spheroid or galaxy. These black hole
mass scaling relations reveal a strong symbiosis between galaxies and black
holes, define important constraints about their co-evolution through the
cosmic time, and set the boundary conditions (at z = 0) for theoretical models
and simulations of galaxy evolution. See the full abstract here.