Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Dunkle Materie"”.
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Measuring cosmic structure
… sondern für ein Verständnis der kosmischen Materieverteilung positiv nutzbar gemacht. Die vorliegende Arbeit entwickelt in diesem Sinne Maße, welche eine quantitative Beschreibung von solchen Inhomogenitäten liefern, wendet sie sowohl auf Realdaten als auch auf numerische Simulationen an und …
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Satellite dynamics in spiral galaxies with Dark Matter haloes
… Satelliten-Galaxien in einer, von einer massiven dunklen Korona (dunkle Materie) umgebenen Spiral-Galaxie. Die Hauptziele sind: (i) die Durchführung einer detaillierten theoretischen Analyse der dynamischen Reibung, d.h. des Prozesses, der die Verschmelzung der Satelliten verursacht und (ii) der …
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Cosmological applications of gravitational lensing
… Fragestellungen zu bearbeiten: die Natur der dunklen Materie in Galaxienhalos und die Rotation des Universums. Zuerst untersuche ich den Mikrolinseneffekt in den Gravitationlinsensystemen Q0957+561 und Q2237+0305. In diesen Systemen scheint das Licht eines Quasars durch die Linsengalaxie …
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Towards a precise measurement of the cosmic-ray positron fraction
This thesis deals with detector concepts aiming at a precise measurement of the cosmic-ray positron fraction extending to an as yet unreached range of energy. The indirect search for dark matter is the main motivation for this endeavour. The evolution and large-scale structure of the Universe is …
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Multi-messenger constraints and pressure from dark matter annihilation into electron-positron pairs
Despite striking evidence for the existence of dark matter from astrophysical observations, dark matter has still escaped any direct or indirect detection until today. Therefore a proof for its existence and the revelation of its nature belongs to one of the most intriguing challenges of nowadays …
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Signatures of SUSY dark matter at the LHC and in the spectra of cosmic rays
Over the past decades it has become evident that luminous matter amounts only to a small fraction of the energy density in the universe. More than 75% is accounted for by what is called the dark energy, and about 20% must exist in the form of some kind of non-relativistic dark matter. Among the …
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Space qualification of the transition radiation detector of the AMS-02 experiment and indirect search for dark matter
We know that the universe consists of 22\% dark matter. The dark matter particle has to be stable, non-relativistic and only weakly interacting. But we don't know what the dark matter is made of and how it is distributed within our Galaxy. Supersymmetric models predict the existence of the lightest …
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Search for cosmic-ray antiparticles with bolloon-borne and space-borne experiments
This thesis discusses two different approaches for the measurement of cosmic-ray antiparticles in the GeV to TeV energy range. The first part studies the prospects of antiparticle flux measurements with the proposed PEBS detector. The project allots long duration balloon flights at one of Earth's …