E-Dissertationen: Auflistung E-Dissertationen nach Schlagwort "Galaxienhaufen"
Anzeige der Dokumente 1-14 von 14
-
Combined Weak Lensing and X-Ray Search for Galaxy Clusters and the Filaments Connecting Them
Dietrich, Jörg Peter (2006)The work presented here has four main parts. <br /> (1) A newly developed, almost fully automated data reduction pipeline for optical single- and multi-chip CCD cameras is described. Its image products are compared to those ... -
A Detailed Study of Galaxy Clusters with Weak Gravitational Lensing and X-rays
Piel, Jennifer Miriam (2012-07-17)Galaxy clusters represent the top of hierarchical structure formation with the largest dark matter halos. Their abundance with respect to mass and redshift can be used to constrain cosmological parameters. The most extensive ... -
Dynamical Studies of the Globular Cluster Systems around the Giant Elliptical Galaxies NGC4636 and NGC1399
Schuberth, Ylva (2011-08-02)Dark matter studies in elliptical galaxies were long hampered by the lack of suitable dynamical tracers. The advent of 8 m-class telescopes equipped with multi-object spectrographs has made it possible to use globular ... -
Exploring Dark Matter Properties from the Smallest to the Largest Scales
Bradač, Maruša (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 ... -
Forecasts for Galaxy Cluster Observations and Cosmological Implications from the eROSITA All-Sky Survey
Borm, Katharina (2016-04-19)One of the most commonly asked questions in astrophysics today refers to the nature of dark energy. The characteristics of this parameter are imprinted in the large-scale structure of matter and accordingly also in the ... -
Observations of the Sunyaev-Zel'dovich Effect towards Clusters of Galaxies with the APEX Telescope
Nord, Martin (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 ... -
Optical confirmation and weak lensing mass constraints for distant Sunyaev-Zel'dovich-detected galaxy clusters
Zohren, Hannah (2022-03-28)Galaxy clusters reside in the densest regions of the large-scale matter distribution of the Universe. Therefore, their number density as a function of mass and redshift is a powerful tool for cosmological studies aiming, ... -
Optical Data Analysis and its Application to Cosmology
Buddendiek, Axel (2016-03-30)This work is concerned with different aspects of observational cosmology. It covers a broad range of problems that one needs to deal with in optical astronomy.<br /> Three introduction chapters about cosmology, gravitational ... -
Structure in galaxy clusters revealed through Sunyaev-Zel’dovich observations: A multi-aperture synthesis approach
Burkutean, Sandra (2014-12-02)As the largest bound objects in the universe, galaxy clusters are unique targets to study astrophysical processes, as well as powerful probes for precision cosmology. Galaxy clusters are dynamically young and their merger ... -
Weak gravitational lensing analyses of clusters of galaxies
Holhjem, Karianne (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 magnification in SpARCS
Tudorică, Alexandru (2020-02-04)The growth of large scale structure is one of the fundamental predictions of any cosmological model. Galaxy clusters are the highest peaks in the cosmological matter density field and therefore of prime importance in ... -
Weak Lensing Mass Determination of Eight X-ray Selected Galaxy Clusters from the 400d Survey
Israel, Holger (2011-01-19)Evolution in the mass function of galaxy clusters sensitively traces both the expansion history of the Universe and cosmological structure formation. Hence, measuring the number density of galaxy clusters as a function of ... -
Weak lensing measurements for the APEX-SZ cluster survey
Klein, Matthias (2014-12-02)The formation of structures in the universe, such as galaxy clusters, depends sensitively on cosmological parameters. Measuring the abundance of clusters as a function of mass and redshift therefore yields a way to constrain ... -
X-Ray Studies of Galaxy Clusters and Groups: Gas Properties in the Exceptional Cases of Faint Outskirts, High Redshift and a Merging Event
Thölken, Sophia (2018-01-26)The history and evolution of the universe, the understanding of the formation of structures and the investigation of a wealth of astrophysical phenomena are the topical subjects in present-day galaxy cluster physics and ...