The Faculty of Mathematics and Natural Sciences: Search
Now showing items 21-30 of 66
Shocks in the interstellar medium
(2014-01-09)
Shocks are ubiquitous in the interstellar medium (ISM), occurring whenever large pressure gradients lead to fluid-dynamical disturbances that move at a velocity that exceeds the local sound speed. As shocks dissipate kinetic ...
Molecular Outflows in Star Forming Regions
(2014-05-21)
This thesis work focus on the study of the molecular emission from outflows produced by jets in regions of star formation. After introducing the topic of star formation, and in particular its related outflow process, a ...
The Quintuplet cluster: A young massive cluster study based on proper motion membership
(2014-01-27)
Young massive clusters define the high mass range of current clustered star formation and are frequently found in starburst and interacting galaxies. As - with the exception of the nearest galaxies within the local group ...
Statistical Analyses of Massive Stars and Stellar Populations
(2015-03-04)
Massive stars, i.e. stars more massive than about ten times that of the Sun, are key agents in the Universe. They synthesise many of the chemical elements that are so important for life on Earth, helped reionising the early ...
Statistical properties of cosmological correlation functions
(2015-04-24)
Correlation functions are an omnipresent tool in astrophysics, and they are routinely used to study phenomena as diverse as the large-scale structure of the Universe, time-dependent pulsar signals, and the cosmic microwave ...
Challenges of theoretical and numerical structure formation in a ΛCDM universe
(2015-06-22)
Systematic surveys of the extra-galactic sky have revealed the existence of large-scale structures in the Universe: the galaxy distribution is organized in a complex network of filaments surrounding underdense regions and ...
Galaxies in Milgromian Dynamics
(2015-02-04)
Since its first formulation in 1983, Milgromian dynamics (also known as modified Newtonian dynamics or MOND) has been very successful in predicting the gravitational potential of galaxies from the distribution of baryons ...
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 ...
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 ...