Mathematisch-Naturwissenschaftliche Fakultät: Suche
Anzeige der Dokumente 11-19 von 19
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 ...
Deep radio continuum study of NGC 4631 and its Faraday tomography
(2016-11-29)
NGC4631 is a nearby edge-on spiral galaxy with a spectacular radio halo, one of the largest observed among edge-on galaxies. This makes the galaxy an ideal target to study the properties of synchrotron halos, the propagation ...
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 ...
Dust and gas in the MilkyWay: a full-sky view on the multiphase interstellar medium
(2016-11-04)
The Milky Way (MW) Galaxy is a unique laboratory to study the evolution of spiral galaxies, offering great sensitivities and angular resolutions with respect to observations of other galaxies. There, the large distance and ...
Forecasts for Galaxy Cluster Observations and Cosmological Implications from the eROSITA All-Sky Survey
(2016-04-19)
One of the most commonly asked questions in astrophysics today refers to the nature of dark energy. The characteristics of this parameter are imprinted in the large-scale structure of matter and accordingly also in the ......
On Problems Related To Galaxy Formation
(2016-05-17)
The main idea of the underlying PhD study is to trace the history of the assembly of galaxies and of their subsequent evolution. We approach this issue in two ways: 1) by studying galaxy spin and 2) by studying the oldest ...
X-ray analysis of a complete sample of galaxy clusters
(2016-03-30)
Modern cosmology tries to trace the history and predict the future of our Universe. Great achievements have been made by the discovery of the accelerated expansion, the claim for Dark Matter and Dark Energy, the detection ...
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 ...