E-Dissertationen: Search
Now showing items 1-10 of 12
Searches for Neutrinos from Supernovae Using Cherenkov In-Ice Detectors
(2017-05-15)
Supernovae mark the violent death of massive stars. They are among the most energetic processes known to exist in the Universe. Neutrinos play crucial roles in supernova processes. Besides the low-energy neutrinos emitted ...
Massive stars on the main sequence
(2017-03-10)
Massive stars have a strong influence on their environment by chemical enrichment of the surrounding interstellar medium due to strong stellar winds. The influence of mass loss and rotation on the main-sequence evolution ...
Cosmological Investigations On Large And Small Scales
(2017-03-03)
The standard model of cosmology, founded on Einstein’s theory of gravity and on the Cosmological Principle (CP), has been understood as being successful in providing explanations for many observations so far. However, it ...
Helium Accreting White Dwarfs as Progenitors of Explosive Stellar Transients
(2017-11-27)
Accretion induced transients, which are thought to include the important, yet little understood, supernovae (SNe) of the Type Ia, are among the most luminous events observable in the cosmos. However, SNe Ia are only one ...
Long-term timing of pulsars in globular clusters
(2017-12-20)
Pulsars are fast rotating, magnetized neutron stars that result from the supernova explosion of massive stars. Thanks to their coherent radiation, emitted in the form of collimated beams from the two magnetic poles, pulsars ...
Water deuterium fractionation in star-formation regions
(2017-10-26)
Water is an essential molecule to oxygen chemistry and to the proliferation of life. Also, it is the main constituent of icy grain mantles in the Universe. The formation of water can be studied through the HDO/H2O ...
Molecules in the circumstellar envelope of the evolved carbon-rich star IRC+10216
(2017-03-29)
Modern radio interferometers allow the imaging of spectral line emission over a wide range of frequencies with high angular resolution. In this thesis we present a detailed empirical examination and description of the ...
Weak Gravitational Lensing Study of Dark Matter Distribution in The Abell 226/228 Supercluster Field Using The COMBO-17 Survey Data
(2017-06-30)
Accurate photometric calibration of optical data is crucial for photometric redshift estimation. We present the Softassign Procrustes Matching method (SPM) to improve the colour calibration upon the commonly used Stellar ...
Weak Lensing–X-ray Scaling Relations for a High Redshift Galaxy Clusters Sample
(2017-07-21)
Accurate cosmology through large X-ray selected galaxy cluster samples will rely on accurate mass estimates and well-calibrated mass-observable relations. The comparison of independent approaches, such as X-ray and ...
Exploring Radio Pulsars With New Technologies
(2017-04-03)
Pulsars are rapidly-rotating, highly-magnetized compact neutron stars. Their strong gravitational and magnetic fields, together with the stability of their rotations and the precision with which we can measure them using ...