E-Dissertationen: Search
Now showing items 1-10 of 11
Properties of the Molecular Gas in Low Metallicity Environments
(2007)
Understanding star formation is of great importance in modern astrophysics because it gives us crucial information on the way galaxies evolve and therefore provides important insights into the evolution and nature of our ...
A Global 86 GHz VLBI Survey of Compact Radio Sources
(2007)
We present results from a large global VLBI survey of compact radio sources at 86 GHz. The main goal of the survey is to increase the total number of objects accessible for future 3-mm VLBI imaging by factors of 3-5.
Superconducting bolometers for millimeter and submillimeter wave astronomy
(2007)
Bolometers are simple and robust incoherent continuum detectors which nevertheless can reach sensitivities close to the fundamental noise limit. This thesis describes the theory, design, fabrication and testing of the ...
Application of photometric redshifts on the correlation properties of galaxies and matter
(2007)
In the past years cosmology, the science of the universe as a whole, has seen tremendous progress. The Lambda-Cold-Dark-Matter scenario is widely accepted as the standard model of cosmology describing the evolution of the ...
Infrared Spectro-Interferometry of Massive Stars: Disks, Winds, Outflows, and Stellar Multiplicity
(2007)
Interferometry is the ultimate technology for overcoming the limitations which diffraction and the atmosphere-induced seeing impose on the resolution achievable with ground-based telescopes. The latest generation of ...
The State and Evolution of Isolated Dense Molecular Cores
(2007)
This work presents studies of nearby (< 500 pc) dense molecular cloud cores, the sites of low-mass star formation. The sample includes starless and protostellar cores and allows to compare their properties in a homogenous ...
Early Nucleosynthesis Studies with Quasar Absorption Line Spectroscopy
(2007)
Studying the light of celestial objects in different wavelengths is a fundamental approach and very common in astronomy, where large ground based telescopes and sophisticated high-resolution spectrographs became recently ...
High-energy processes in low-mass protostars – an X-ray to radio multi-wavelength perspective
(2007)
High-energy processes in protostars remain poorly understood. Only after the recently finished Chandra Orion Ultra-deep Project (COUP), statistically significant information on X-ray emission from Young Stellar Objects ...
Cosmic Shear Analysis of the Garching-Bonn-Deep Survey
(2007)
We perform a cosmic shear analysis of 15 square degree high-quality R-band data of the Garching-Bonn Deep Survey (GaBoDS) obtained with the Wide-Field-Imager (WFI) at the ESO/MPG 2.2m telescope. The GaBoDS comprises 1.75 ...
Multi-Frequency Study of the NVSS Foreground Sources in the Cosmic Background Imager Fields
(2007)
The point radio sources comprise one amongst the major contaminants of the Cosmic Microwave Background radiation. Consequently, they possess a significant potential for causing severe distortion of the information imprinted ...