Mathematisch-Naturwissenschaftliche Fakultät: Suche
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Starburst clusters in the Galactic center
(2015-07-07)
The central region of the Galaxy is the most active site of star formation in the Milky Way, where massive stars have formed very recently and are still forming today. The rich population of massive stars in the Galactic ......
The APEX submillimeter imaging survey of distant galaxies in the COSMOS field
(2015-11-16)
Submillimeter galaxies (SMGs) are far-infrared luminous, vigorously star forming galaxies in the early universe. They are major contributors to the extragalactic far-infrared background emission, and they trace the most ...
Weak lensing measurements for the APEX-SZ cluster survey
(2014-12-02)
The formation of structures in the universe, such as galaxy clusters, depends sensitively on cosmological parameters. Measuring the abundance of clusters as a function of mass and redshift therefore yields a way to constrain ...
Massive Black Holes in Galaxies
(2014-10-16)
After summarizing the current status of black hole related research, I investigate the angular momentum driven flux of stars onto supermassive black hole (SMBH) loss cone orbits by means of direct NBODY6 computations. By ...
Pulsar searching and timing with the Parkes telescope
(2014-12-08)
Pulsars are highly magnetised, rapidly rotating neutron stars that radiate a beam of coherent radio emission from their magnetic poles. An introduction to the pulsar phenomenology is presented in Chapter 1 of this thesis. ...
Structure in galaxy clusters revealed through Sunyaev-Zel’dovich observations: A multi-aperture synthesis approach
(2014-12-02)
As the largest bound objects in the universe, galaxy clusters are unique targets to study astrophysical processes, as well as powerful probes for precision cosmology. Galaxy clusters are dynamically young and their merger ...
The Physical Properties of Intermediate-Velocity Gas at High Galactic Latitudes
(2016-07-26)
The accretion of matter onto galactic disks, the formation of molecular clouds, and the formation of stars are of major importance for the evolution of galaxies over cosmic times. During their lifetimes, high-mass stars ...
Physical processes behind the periodic radio and gamma-ray emission from the X-ray binary LS I +61°303
(2016-07-21)
X-ray binaries are binary stars composed of a normal star and a compact object which, via Roche-lobe overflow or wind accretion, accretes matter from the companion. X-ray emission from these objects can be either thermal ...
The evolution of low-metallicity massive stars
(2016-08-11)
Massive star evolution taking place in astrophysical environments consisting almost entirely of hydrogen and helium – in other words, low-metallicity environments – is responsible for some of the most intriguing and energetic ...
Studying galaxy clusters through X-rays and the Sunyaev-Zel’dovich effect: simulations, detection and characterisation
(2016-07-26)
Clusters of galaxies are the largest gravitationally-bound objects in the Universe. Thereby clusters are ideal tracers of cosmic expansion and structure formation that allow tight constraints on the average cosmic density ...