E-Dissertationen: Suche
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Innovative Pulsar Searching Techniques: or Fantastic Pulsars and How to Find Them
(2018-06-14)
Pulsars are rapidly rotating, highly magnetised neutron stars which emit beams of electromagnetic radiation from their magnetic poles, most commonly in the radio spectrum. These massive and extremely compact objects have ...
Binary star population synthesis: Progenitors of gravitational wave driven mergers
(2018-06-13)
The vast majority of all massive stars are born in binaries. The binarity of a star may influence its life drastically via a large variety of interactions with its companion star. Several astrophysical events, like the ...
X-Ray Studies of Galaxy Clusters and Groups: Gas Properties in the Exceptional Cases of Faint Outskirts, High Redshift and a Merging Event
(2018-01-26)
The history and evolution of the universe, the understanding of the formation of structures and the investigation of a wealth of astrophysical phenomena are the topical subjects in present-day galaxy cluster physics and ......
The impact of tides and mass transfer on the evolution of metal-poor massive binary stars
(2018-05-24)
Stars more massive than 10Msun , although few in number compared to objects like our sun, play a very large role in the evolution of the universe. Through strong winds and supernovae they enrich the interstellar medium ...
Evolution of carbon-enhanced metal-poor stars originating from mass transfer in stellar binaries
(2018-03-26)
As the hydrogen and helium created shortly after the Big Bang is gradually processed into heavier elements by successive generations of stars, the overall metal content of the Universe increases. Metal-poor stars which, ...
Terahertz Airborne Astronomy using a Four Detector High Resolution Spectrometer: 4GREAT
(2018-12-12)
After the Herschel Space Telescope ceased operations in 2013, the astronomical community has been lacking access to those parts of the terahertz spectrum that are not visible from ground-based observatories. The atmosphere ...
Mass calibration of the Sunyaev-Zel'dovich effect using APEX-SZ galaxy clusters
(2018-12-14)
Clusters of galaxies are the most massive, gravitationally bound structures in the Universe. Their abundance across cosmic time and space is sensitive to cosmological parameters. Of particular interest to modern cosmology ...
The evolution of massive stars in the Small Magellanic Cloud
(2019-03-27)
Massive stars in the early universe are born with only a small amount of heavy elements (or, 'metals’). These metal-poor massive stars played a crucial role in shaping the galaxies in the early universe. They are also the ...
Small-scale Physical and Chemical Structure of Diffuse and Translucent Molecular Clouds along the Line of Sight to the Galactic Center
(2019-05-02)
Diffuse and translucent molecular clouds constitute a large part of the molecular interstellar medium (ISM) in our Galaxy as well as in other spiral galaxies. In particular, the envelopes of giant molecular clouds (GMCs), ...
Massive filamentary clouds and their role in star formation
(2019-05-27)
Filamentary structures are ubiquitous in the interstellar medium of the Milky Way. They are observed at a large range of size-scales from ~ 1 pc within star-forming and quiescent molecular clouds to ~ 100 pc representing ...