DeutschClear Cookie - decide language by browser settings Xiang,
Fei (2008): Impact of AGN on the gas in clusters of galaxies.
Dissertation, LMU München: Faculty of Physics    Clusters of
galaxies with masses up to few $10^{15}~M_\odot$ are the largest
gravitationally bound objects in the Universe. According to the
widely accepted hierarchical model of structure formation the
largest structures are formed by mergers of smaller (less
massive) objects. Massive clusters are therefore expected to
appear in the Universe only ``recently'' (redhshifts $z < 1-2$)
and their number is very sensitive to the cosmological
parameters, such the amplitude of primordial fluctuations and
dynamics of the Universe expansion which is in turn related to
dark energy and dark matter content of the Universe. Three major
constituents make a galaxy cluster: stars (readily observable in
bright optical galaxies), hot X-ray emitting gas (observed with
modern X-ray space observatories) and dark matter (indirectly
observed through its influ