Friday, April 19, 2002, 16:00
WHGA Auditorium
Prof. G. Hasinger, MPI for extraterrestric physics, Munich
Abstract:
X-ray spectroscopy with XMM is now of such high quality that even for
faint
AGN at intermediate redshifts Fe K-alpha lines can be detected and
utilized
to diagnose the gravitational potential in the immediate vicinity of the
black hole. The future studies will focus on a better understanding
of the formation and accretion history of the black holes as well as
their
physical environment. In particular the comparison with the star forming
history in the universe and the question: "Who was there first, the
stars
or the black holes?" will be important in the first decades of the new
century.
Future X-ray observatories, most notably XEUS, will be able to detect
and
study
early black holes out to redshifts of ~10 and possibly constrain their
mass
and
spin evolution.