E-Dissertationen: Search
Now showing items 21-30 of 37
Pulsar Discoveries and their Exploitation
(2016-12-22)
Pulsars are the rapidly-rotating, highly-magnetized, neutron star remnants of the supernova explosions of massive stars. Pulsars have been used in a wide variety of studies of astronomy and physics. Of the >2500 pulsars ...
Exploring the environment of high Rotation Measure Active Galactic Nuclei through wide-band radio spectropolarimetry observations
(2016-12-21)
In this Thesis I present an observational study of a sample of radio AGN sources. I study their radio polarization properties in a wide frequency range by observing with the 100-m Effelsberg telescope and the Very Large ...
The Radio Continuum Halos of the Edge-on Galaxies NGC 891 and NGC 4565
(2016-10-13)
The halos of spiral galaxies are complex entities consisting of multiple matter components, generally including neutral and ionized gas phases, cosmic rays (CRs), dust, as well as extraplanar stars. The detection of ...
Some Aspects in Cosmological Perturbation Theory and ƒ (R) Gravity
(2016-09-08)
General Relativity, the currently accepted theory of gravity, has not been thoroughly tested on very large scales. Therefore, alternative or extended models provide a viable alternative to Einstein’s theory. In this thesis ...
Linearly polarised photon beams at the BGO-OD experiment at ELSA
(2016-11-04)
The BGO-OD experiment, located at the electron stretcher facility ELSA in Bonn, is constructed for the study of meson photo-production reactions off the nucleon. The two main detector parts of the experimental setup are a ...
A μ-biomimetic uncooled infrared psensor based on the infrared receptors of Melanophila acuminata
(2016-01-05)
The pyrophilous beetle Melanophila acuminata possesses an organ sensitive to IR radiation. It employs a photomechanic detection principle: A liquid filled pressure chamber is heated by absorbing the radiation. The ...
Search for Supersymmetry in Tau Lepton Final States with the ATLAS Detector
(2016-01-20)
In the search for signs of possible physics beyond the Standard Model, signatures with multiple tau leptons, jets and missing transverse momentum are promising candidates for a discovery. A search in this final state has ...
Femtosekunden-Infrarot-Spektroskopie von dreiatomigen Pseudohalogenid-Ionen sowie organischen und anorganischen Pseudohalogenid-Verbindungen
(2016-01-20)
Die charakteristische, starke Resonanz dreiatomiger Pseudohalogenide im Frequenzbereich von 2000 cm-1 wurde als spektrale Sonde verwendet, um ultraschnelle Vorgänge in kondensierter Materie aufzuklären. Dazu ...
Aufbau und Test eines Szintillationsfaser-Detektors für das neue Vorwärtsspektrometer an ELSA
(2016-03-30)
Im physikalischen Fokus des BGO-OD-Experiments an der Beschleunigeranlage ELSA in Bonn steht die Mesonphotoproduktion an Nukleonen. Ein Ziel ist die genaue Bestimmung der Anregungsspektren von Protonen und Neutronen. Hierfür ...
Optical Data Analysis and its Application to Cosmology
(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.
Three introduction chapters about cosmology, gravitational ...
Three introduction chapters about cosmology, gravitational ...