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Superconducting hot electron bolometers on silicon nitride membranes for terahertz waveguide mixers
(Univ. Köln, 2004)
The topic of this work is the development of Hot Electron Bolometer (HEB) mixers on freestanding membrane substrates for terahertz high resolution heterodyne receiver systems. The radio astronomy in the THz frequency ...
Cosmology through gravitational lenses
(Univ. Potsdam, 2004)
In dieser Dissertation nutze ich den Gravitationslinseneffekt, um eine Reihe von kosmologischen Fragen zu untersuchen. Der Laufzeitunterschied des Gravitationslinsensystems HE1104-1805 wurde mit unterschiedlichen Methoden ...
Kopplung globaler Eigenschwingungen der Sonne durch Konvektion
(Univ. Freiburg (Breisgau), 2002)
Der Einfluss von grossskaligen Stroemungskomponenten auf globale adiabatische solare Oszillationen wird mit Hilfe von Stoerungstheorie untersucht. Stationaere poloidale Komponenten fuehren zu Frequenzverschiebungen, die ...
Catastrophic cooling in solar coronal loops
(Univ. Freiburg (Breisgau), 2005)
Satellite observations with high spatial and temporal resolution have revealed the highly dynamic nature of the solar corona and enabled us to study physical processes in the outer atmosphere of our mother star in great ...
The upper atmospheric fountain effect in the polar cusp region
(GFZ, Helmholtz-Zentrum, Potsdam, 2009)
This thesis examines how the cusp as a feature of the Earth Magnetic Field influences the (neutral) upper atmospheric dynamics. The thermospheric total mass density, as derived from CHAMP satellite data, shows a distinct ...
Mineralogical analysis and iron abundance estimation of the Moon using the SIR-2, HySI and M3 spectrometers on-board the munar orbiter chandrayaan-1
(Techn. Univ. Zugl.: Clausthal, 2012)
The work presented in this thesis is focused on mineralogical studies of the Moon aiming
to create maps of iron abundances. We used the data from visible to near-infrared (VISNIR)
spectrometers on-board Chandrayaan-1 ...
Inverse estimation for the simple earth system model ACC2 and its applications
(Univ. Hamburg, 2008)
The Aggregated Carbon Cycle, Atmospheric Chemistry, and Climate model (ACC2) (Tanaka and Kriegler et al., 2007a) describes physical-biogeochemical processes in the Earth system at a global-annual-mean level. Compared to ...
New constraints on the density of the extragalactic background light and the discovery of TeV g-rays [gamma-rays] from the BL Lac 1ES 0347-121 and the extended source HESS J1023-575
(Univ. Hamburg, 2007)
Die H.E.S.S. Kollaboration betreibt ein stereoskopisches System aus vier großen abbildenden Cherenkov-Teleskopen für den Nachweis sehr hochenergetischer Gamma-Strahlung (VHE; > 100 GeV). In dieser Arbeit wird über den ...
Star formation conditions in nearby galaxies
(Univ. Köln, 2008)
The understanding of gravitational stability of galactic disks against star formation, the interplay of atomic and molecular components of the interstellar medium in a galaxy and its physical conditions, namely temperature ...
The near infrared activity of Sagittarius A*
(Univ. Köln, 2008)
The meaning of my thesis was to obtain new insights about the supermassive Black Hole in the center of our Milky Way and its accretion flow. The non-thermal radio, X-ray, and near-infrared source Sagittarius A* (Sgr A*) ...