Weak lensing mass determination of eight X-ray selected galaxy clusters from the 400d survey [Elektronische Ressource] / vorgelegt von Holger Israel

Weak Lensing Mass DeterminationofEight X-ray Selected Galaxy Clustersfrom the 400d SurveyDissertationzurErlangung des Doktorgrades (Dr. rer. nat)derMathematisch–Naturwissenschaftlichen Fakulta¨tderRheinischen Friedrich–Wilhelms–Universita¨t Bonnvorgelegt vonHolger IsraelausGot¨ tingenBonn, 2010Angefertigt mit Genehmigung derMathematisch–Naturwissenschaftlichen Fakulta¨t derRheinischen Friedrich–Wilhelms–Universita¨t Bonn1. Referent: Prof. Dr. Thomas H. Reiprich2. Referent: Prof. Dr. Peter SchneiderTag der Promotion: 17. Dezember 2010Erscheinungsjahr: 2011iiAbstractEvolution in the mass function of galaxy clusters sensitively traces both the expansion historyof the Universe and cosmological structure formation. Hence, measuring the number density ofgalaxy clusters as a function of redshift provides constraints to cosmological parameters, indepen-dent of other methods. Current results from these probes, including clusters of galaxies, are foundto agree on a cosmological model dominated by Dark Energy and Cold Dark Matter. Investigatingthe unknown physical nature of Dark Energy ranks among the foremost questions in current cos-mology. In particular, the presence or absence of evolution in Dark Energy density is expressedby the equation-of-state parameter.