Auflistung nach Schlagwort "Kosmogonie {Astronomie}"
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Hydrogen-deficient central stars of planetary nebulae
(Univ. Potsdam, 2009)Central stars of planetary nebulae are low-mass stars on the brink of their final evolution towards white dwarfs. Because of their surface temperature of above 25,000 K their UV radiation ionizes the surrounding material, ... -
Mass distribution at the galactic centre
(Univ. Köln, 2005)In the framework of this PhD thesis, the study of the distribution of an extended mass close to the super-massive black hole (SMBH) at the centre of our Galaxy is addressed using observational data and theoretical modelling. ... -
Physical and chemical properties of molecular gas in star forming regions
(Univ. Köln, 2008)In this thesis I study the physical and chemical properties of molecular gas in star forming regions. This work takes advantage of the newly developed CONDOR receiver, which allows spectrally resolved observations of ... -
Present and early star formation - a study on rotational and thermal properties
(Univ. Potsdam, 2006)We investigate the rotational and thermal properties of star-forming molecular clouds using hydrodynamic simulations. Stars form from molecular cloud cores by gravoturbulent fragmentation. Understanding the angular momentum ... -
Properties of turbulent star-forming clusters - models versus observations
(Univ. Potsdam, 2006)Sterne entstehen im Inneren von turbulenten Molekülwolken, die unter dem Einfluss ihrer eigenen Gravitation fragmentieren und kollabieren. So entsteht ein Sternhaufen aus hundert oder mehr Objekten. Der Sternentstehungsprozess ... -
Star formation conditions in nearby galaxies
(Univ. Köln, 2008)The understanding of gravitational stability of galactic disks against star formation, the interplay of atomic and molecular components of the interstellar medium in a galaxy and its physical conditions, namely temperature ... -
Star formation history of low surface brightness galaxies in the HDFS
(Univ. Bochum, 2005)I presented the first study of the SFH of LSB galaxies by using integrated spectra. The analyzed sample was derived during a search for LSBs in the HDFS. The selection was done using a new method based on the locations of ... -
Star formation in the Magellanic Clouds based on 1.2 mm continuum observations
(Univ. Bochum, 2004) -
The formation of massive stars
(Univ. Bochum, 2008) -
The influence of high speed collisions and gas flow on the formation of planetesimals
(Univ. Münster (Westfalen), 2006)Ein zentrales Problem der Planetologie ist die Frage nach der Entstehung der Planeten. Als Vorläufer der Planeten werden die so genannten Planetesimale betrachtet. Diese km-großen Körper wachsen in protoplanetaren Scheiben ... -
Zeeman-Doppler Imaging of active late-type stars
(Univ. Potsdam, 2009)Stellar magnetic fields, as a crucial component of star formation and evolution, evade direct observation at least with current and near future instruments. However investigating whether magnetic fields are generated by a ...