Heidelberg Joint Astronomical Colloquium

Speaker Knud Jahnke
Title Co-evolution of galaxies and black holes
Abstract In massive galaxies the small scale property of black hole mass correlates with the 100.000.000 times larger scale properties of bulge mass, velocity dispersion and luminosity. This is generally interpreted as a long-term co-evolution of galaxies and their central black holes over cosmic times, with a self-regulating "feedback" loop governing the abundance of gas available for black hole growth and star formation. I will review the actual evidence for co-evolution and feedback and analyse how direct or indirect this co-evolution is or has to be, and whether there are alternative explanations for these intriguing scaling relations of galaxies and black holes.