The Faculty of Mathematics and Natural Sciences: Search
Now showing items 11-20 of 244
Far-infrared-to-centimeter-wave spectroscopicobservations of Planck-selected starburst galaxies
(2021-03-15)
Star-formation processes in the early Universe have had a dramatic influence on the further development of galaxies. The peak era for stellar production occurred in early cosmic times, and most of the stars that could have ......
Spiral Galaxies with Thick Box/Peanut Bulges
(2003)
The close connection between bars and box/peanut-shaped bulges is observationally and theoretically supported. However, for the class of thick box/peanut-shaped bulges an environmental hypothesis instead of an internal ...
Asymmetries of Radio Galaxies
(2003)
In this work, we have studied the asymmetries of radio galaxies which are known to be related to the jet-asymmetry. They are the depolarization asymmetry and the spectral index asymmetry.
The first part of the thesis ...
The first part of the thesis ...
The impact of binary interaction on the main-sequence morphology of young star clusters
(2022-03-04)
Star clusters play a vital role in our understanding of stellar physics and evolution, because they are believed to contain stars born at the same time, with the same initial conditions. Therefore, the distribution of the ...
Dynamical Studies of the Globular Cluster Systems around the Giant Elliptical Galaxies NGC4636 and NGC1399
(2011-08-02)
Dark matter studies in elliptical galaxies were long hampered by the lack of suitable dynamical tracers. The advent of 8 m-class telescopes equipped with multi-object spectrographs has made it possible to use globular ...
Third-order Cosmic Shear Statistics: Covariance, Nulling, and E/B-mode decomposition
(2012-02-17)
Weak gravitational lensing has emerged in the last decade as a competitive cosmological probe to observationally constrain the properties of dark energy, probably the one with the most statistical power when the results ...
Modelling redshift-space distortion effects on spatial clustering and velocity statistics
(2020-10-08)
The nature of gravity as we know is that it pulls. Issac Newton's Principia generalised this gravity as a universal attractive force which weakens with distance. However in the late 1990s it was found that our Universe is ......
Stellar populations in gravitationally bound systems
(2020-08-21)
The understanding of how, which, where and when stars form provides important information for the vast majority of astronomical fields. Star-formation has a complex multi-scale physical nature. Stars form in dense sub-parsec ...
The Dusty, Molecular Envelopes of Red Supergiant Stars: VY Canis Majoris as the Archetypal Example
(2011-11-15)
Red supergiant stars are surrounded by dusty envelopes, which harbor a multitude of molecules. Often, they are also known to show maser emission. We collect a sample of 88 red supergiants associated with Galactic open ...
High resolution magnetic field measurements in high-mass star-forming regions
(2011-09-22)
Three different scenarios have been proposed to explain the formation of high-mass stars. In one of these scenarios, core accretion, massive stars form through gravitational collapse, which involves disk-assisted accretion ...