E-Dissertationen: Search
Now showing items 31-40 of 42
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 ...
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 ...
Formation of low-mass helium white dwarfs orbiting binary millisecond pulsars
(2017-04-25)
Millisecond pulsars (MSPs) belong to a class of radio pulsars characterized by high rotational spin rates and low magnetic fields. These neutron stars are believed to be the end-product of binary evolution, in which an old ...
A 3-mm Imaging Line Survey of the Central Molecular Zones of M 82 and IC 342
(2020-07-07)
The central molecular zones of two nearby galaxies M 82 and IC 342 are among the most prominent extragalactic molecular sources in the northern hemisphere. While M 82 is a relatively small late type starburst galaxy, IC ...
Probing the Magnetized Medium of Galaxies and AGNs using Wideband Radio Polarimetry
(2019-08-13)
I performed an observational study of diffuse linearly polarized synchrotron emission of a nearby galaxy and of extragalactic background sources in order to study cosmic magnetism. The speciality of my work is given by the ......
Probing the Interstellar Medium and Dark Matter with Pulsars
(2020-03-05)
Pulsars are rapidly rotating, highly magnetised neutron stars which emit electromagnetic radiation from their magnetic poles in the form of highly collimated beams. Pulsars are known as a powerful tool to probe the ...
New Insights into the Milky Way Magnetic Fields through Radio Broadband Spectro-polarimetry
(2020-03-05)
Magnetic field is an essential ingredient of the interstellar medium of galaxies. In particular, an accurate characterisation of the magnetic field strength and structure of the Milky Way is crucial for complete understanding ...
Halo bias renormalisation
(2020-06-09)
Modern galaxy redshift surveys provide a wealth of information about the evolution of our Universe. They allow to measure both the two-dimensional position on the sky and the distance (given by the cosmological redshift) ...
Radio Continuum of Galaxies with H2O-Megamaser-Disks
(2019-11-08)
Galaxies with H2O-megamaser-disks are low luminosity active galaxies where 22GHz H2O-maser emission is detected in their accretion disk surrounding the central supermassive black hole (SMBH). Furthermore, ...