The evolution of QSO host colours
Schramm, Malte; Wisotzki, Lutz; Jahnke, Knud; Sanchez, Sebastian F.
Germany, Spain
Abstract
We summarise the evidence that the hosts of luminous QSOs are systematically bluer than normal (inactive) galaxies of comparable morphological type. We particularly emphasize the importance of performing such studies in a comparative way, placing QSO hosts in a context of the overall galaxy population.