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Present and early star formation
(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 ...
Verbesserung der Richtungsstabilisierung von inertial gesteuerten astronomischen Flugzeugteleskopen am Beispiel von SOFIA
(Univ. Berlin, 2006)
Diese Arbeit beschreibt die Verbesserung der Richtungsstabilisierung des Flugzeugteleskops SOFIA. Das Ziel des Flugzeugteleskops SOFIA sind astronomische Beobachtungen im Infrarotbereich. Da der Wasserdampf der Erdatmosphäre ...
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 ...
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 ...
Circumplanetary dust dynamics
(Univ. Potsdam, 2007)
Our Solar system contains a large amount of dust, containing valuable information about our close cosmic environment. If created in a planet's system, the particles stay predominantly in its vicinity and can form extended ...
High‐Resolution Observations of Turbulence Distributions Across Tropopause Folds
(
- Journal of Geophysical Research: Atmospheres
, 2021-03-22)
In this study, we interpret two vertical turbulence measurements. We acquired these uninterrupted high‐resolution dissipation rate profiles with the balloon‐borne instrument LITOS (Leibniz Institute Turbulence Observations ...
How Does the North Atlantic SST Pattern Respond to Anthropogenic Aerosols in the 1970s and 2000s?
(
- Geophysical Research Letters
, 2021-03-28)
We show how changes in the global distribution of anthropogenic aerosols favor different spatial patterns in the North Atlantic sea‐surface temperature (NASST). The NASSTs largely show the expected decrease associated with ...
Accretion and emission close to supermassive black holes in quasars and AGN
(Univ. Hamburg, 2006)
With the last generation of X-ray satellites, such as XMM-Newton and Chandra, our knowledge about the X-ray properties of Active Galactic Nuclei (AGN) has greatly improved. Detailed spectroscopy and long-term observations ...
Kinematik und Dynamik neogener Deformationsprozesse des südzentralchilenischen Subduktionssystems, nördlichste Patagonische Anden (37° - 40° S)
(Univ. Hamburg, 2003)
Die dynamische Entwicklung des neotektonisch und vulkanisch aktiven südchilenischen Plattenrandes wird durch die schiefe Subduktion der ozeanischen Nazca Platte unter den südamerikanischen Kontinent gesteuert. Die Deformationen ...
X-ray and optical properties of X-ray luminous active galactic nuclei
(Univ. Potsdam, 2008)
Giacconi et al. (1962) discovered a diffuse cosmic X-ray background with rocket experiments when they searched for lunar X-ray emission. Later satellite missions found a spectral peak in the cosmic X-ray background at ~30 ...