Thursday 1 July at 2:30pm

Martin Haas - MPIA

"ISO 5 - 200 micron photometry of ULIRGs and PG quasars"

ABSTRACT: "Is every PG quasar accompanied by considerable amounts of dust? Or do also relatively dust-free, naked quasars exist which might be more evolved? Is the AGN the sole power source in dusty PG quasars or do starbursts play a significant role? What is the relation between PG quasars and ultraluminous IR galaxies? What are the edge-on counterparts of dusty PG quasars? Why could also ULIRGs with cool MIR/FIR colors house a PG quasar? Do ULIRGs have very cold dust (T = 15 K) like normal spirals? Topics like those above are addressed on the basis of sensitive near- to far-infrared photometry with the Infrared Space Observatory ISO."