Theoretical Aspects of Cosmic Shear and its Ability to constrain Cosmological Parameters
Theoretical Aspects of Cosmic Shear and its Ability to constrain Cosmological Parameters
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dc.contributor.advisor | Schneider, Peter | |
dc.contributor.author | Eifler, Tim Frederik | |
dc.date.accessioned | 2020-04-13T22:31:32Z | |
dc.date.available | 2020-04-13T22:31:32Z | |
dc.date.issued | 13.03.2009 | |
dc.identifier.uri | https://hdl.handle.net/20.500.11811/4045 | |
dc.description.abstract | In the last decade weak gravitational lensing by the large-scale structure of the Universe, also called cosmic shear, has become an important tool to constrain cosmological parameters. Despite this success there remain observational and theoretical issues which must be solved to fully investigate the cosmological information of future cosmic shear data. In this PhD thesis I address several of these issues. As a first project I use ray-tracing simulations to compare and optimize cosmic shear data vectors. More precisely, I develop a new data vector by combining two cosmic shear measures, namely the aperture mass dispersion ( As a third project I examine cosmic shear covariances and their impact on cosmological parameter constraints. Using simulated data I investigate the cosmology-dependence of these covariances and develop improved methods for a likelihood analysis, which take the cosmology-dependence into account. In addition to the cosmology-dependence, I examine how the shear fields' non-Gaussianity affects cosmic shear covariances and the parameter constraints (in particular for dark energy parameters). I quantify the impact of non-Gaussianity as a function of angular scale and derive a fit-formula for the calculation of non-Gaussian covariances from Gaussian ones. | |
dc.language.iso | eng | |
dc.rights | In Copyright | |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | Kosmologie | |
dc.subject | schwacher Gravitationslinseneffekt | |
dc.subject.ddc | 520 Astronomie, Kartografie | |
dc.title | Theoretical Aspects of Cosmic Shear and its Ability to constrain Cosmological Parameters | |
dc.type | Dissertation oder Habilitation | |
dc.publisher.name | Universitäts- und Landesbibliothek Bonn | |
dc.publisher.location | Bonn | |
dc.rights.accessRights | openAccess | |
dc.identifier.urn | https://nbn-resolving.org/urn:nbn:de:hbz:5N-16908 | |
ulbbn.pubtype | Erstveröffentlichung | |
ulbbnediss.affiliation.name | Rheinische Friedrich-Wilhelms-Universität Bonn | |
ulbbnediss.affiliation.location | Bonn | |
ulbbnediss.thesis.level | Dissertation | |
ulbbnediss.dissID | 1690 | |
ulbbnediss.date.accepted | 06.02.2009 | |
ulbbnediss.fakultaet | Mathematisch-Naturwissenschaftliche Fakultät | |
dc.contributor.coReferee | Mellier, Yannick |
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