E-Dissertationen: Suche
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Weak gravitational lensing analyses of clusters of galaxies
(2011-04-04)
Comprising the most massive gravitationally bound and relaxed structures in the Universe, galaxy clusters are essential in providing a deeper understanding of the properties of dark matter. Being cosmologically young ...
Weak Lensing Flexion Study
(2010-09-01)
In this thesis, I studied the higher order weak gravitational lensing effect,flexion, and some of its potential applications in cosmology.
Flexion, as a new subject in lensing, has shown its advantages in various ...
Flexion, as a new subject in lensing, has shown its advantages in various ...
Cosmic Shear and the Intrinsic Alignment of Galaxies
(2010-11-12)
Cosmology has recently entered an era of increasingly rich observational data sets, all being in agreement with a cosmological standard model that features only a small number of free parameters. One of the most powerful ...
From galaxies to the cosmic web and back: the interplay of different scales in galaxy formation and cosmic reionization
(2020-10-08)
The evolution of the Universe is primarily governed by gravity, that triggers the development of a complex web-like distribution of galaxies. The latter are embedded in larger structures, called haloes, mainly composed by ...
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 ...
Cosmological Parameters from Second- and Third-Order Cosmic Shear Statistics
(2006)
The weak gravitational lensing effect caused by the large-scale structure of the matter in the Universe (cosmic shear) is a powerful tool to study the matter distribution on very large scales. Cosmic shear surveys provide ...
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 ...
Statistical properties of cosmological correlation functions
(2015-04-24)
Correlation functions are an omnipresent tool in astrophysics, and they are routinely used to study phenomena as diverse as the large-scale structure of the Universe, time-dependent pulsar signals, and the cosmic microwave ...