<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Probing the matter distribution on intermediate and large scales with weak light deflections"^^ . "Gravitational lensing can constrain the cosmic density field, its evolution and spacetime geometry.\r\nIn the first part of this dissertation I demonstrate how information about the internal structure of\r\ngalaxy clusters can be gained from observations of weak gravitational lensing. I present a novel\r\napproach which does not rely on symmetry assumptions or parametric models, but is instead built on\r\na translation-invariant geometric description using Minkowski functionals. An integral measure of the\r\nconvergence is constructed from the shear field. The behaviour of excursion sets of this estimator for\r\nvarying thresholds characterises the morphology of the mass distribution. An intrinsic scale in the\r\ndensity profile manifests itself in a change of the logarithmic slope of the first Minkowski functional. I\r\nshow how the characteristic noise profile of the density estimator affects the measurement and develop\r\na strategy which permits the discrimination between a scale-rich profile and a power law.\r\nIn the second part I study cross-correlations between weak lensing and the integrated Sachs-Wolfe\r\neffect. I treat cosmic shear as a three-dimensional observable and develop a formalism in which the covariance\r\nof both signals can be calculated. For the numerical evaluation a highly efficient method was\r\nimplemented, the performance and reliability of which I demonstrate in a Fisher analysis. For a data\r\nset of the quality of upcoming survey missions like the Euclid satellite, taking the cross-correlation\r\nbetween the two signals into account lowers the error on cosmological parameters by ten per cent."^^ . "2015" . . . . . . . "Britta"^^ . "Zieser"^^ . "Britta Zieser"^^ . . . . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (PDF)"^^ . . . "dissertation.pdf"^^ . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (Other)"^^ . . . . . . "small.jpg"^^ . . . "Probing the matter distribution on intermediate and large scales with weak light deflections (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #19017 \n\nProbing the matter distribution on intermediate and large scales with weak light deflections\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .