TY  - GEN
N2  - This thesis is concerned with the formation of disc galaxies, a special type of galaxies characterised by ordered rotation. The main focus is on testing predictions of theories that try to explain the angular-momentum acquisition of these galaxies. A major issue concerns the proper quanti cation of galaxy morphologies. This is of vital importance for automated and reproducible classi cation of disc galaxies in large data samples. The most promising approach is to expand galaxy morphologies into orthonormal basis functions based on a well motived light pro le (the Sersic profi le). In the main part of this thesis, the angular momenta of several thousand disc galaxies from the Sloan Digital Sky Survey are analysed. It is demonstrated that previous investigations lacked a rigorous account for the relevant error sources, which lead to unjusti ed con rmations of theoretical predictions. If all relevant errors are considered, there is no statistical evidence con rming these predictions. The methods developed here are also relevant in a wider context, as they are applicable to other astrophysical investigations. This thesis concludes with a detailed discussion of potential improvements of measurements and an outline of an observational strategy that will allow for a more decisive empirical test of the theoretical predictions.
A1  - Andrae, René
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/12786/
ID  - heidok12786
KW  - Scheibengalaxien 
KW  -  Drehimpuls 
KW  -  Morphologiedisc galaxies 
KW  -  angular momentum 
KW  -  morphology
AV  - public
TI  - Alignment of Disc Galaxies : Testing the Theory of Angular-Momentum Acquisition
Y1  - 2011///
ER  -