The Faculty of Mathematics and Natural Sciences: Search
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Observations of the Sunyaev-Zel'dovich Effect towards Clusters of Galaxies with the APEX Telescope
(2009-09-14)
Results of 150 GHz continuum observations of several X-ray bright clusters of galaxies in the Sunyaev-Zel'dovich (SZ) effect, carried out using the APEX-SZ bolometer array on the APEX telescope, are presented. Follow-up ...
Measuring cosmological weak lensing using the Advanced Camera for Surveys on board the Hubble Space Telescope
(2008)
Following from the theory of General Relativity, light-bundles are deflected and differentially distorted while passing through the gravitational potential of matter inhomogeneities. The gravitational lensing effect caused ...
The non-Gaussian matter power spectrum covariance in the halo model approach
(2008)
Weak gravitational lensing is one of the most promising tools to analyze the nature of dark energy and dark matter. In order to constrain cosmological parameters with this method a good theoretical understanding of the ...
Weak Gravitational Lensing and Galaxy Bias
(2005)
Galaxies were formed from primordial baryonic matter within the gravitational potential of the dark matter. Today a confusing wealth of different galaxy populations is known. Explaining the emergence of this zoo of galaxy ...
Exploring Dark Matter Properties from the Smallest to the Largest Scales
(2004)
One of the main problems in cosmology is to understand the formation and evolution of galaxies, galaxy clusters, and large-scale structure. Whereas the basics of the current Cold Dark Matter (CDM) paradigm for structure ...
Dark matter halos of galaxies studied with weak gravitational lensing
(2003)
The main goal of this thesis is to investigate the dark matter halos of galaxies. Current theories of galaxy formation predict that galaxies are embedded in large dark matter halos with much larger extents than the visible ...