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On the relevance of adhesion
(Univ. Potsdam, 2006)
Seit ihrer Entdeckung im Jahre 1610 durch Galileo Galilei faszinieren die Ringe des Saturn sowohl Laien als auch Experten. Planetare Ringe finden sich in der Äquatorialebene aller vier Riesenplaneten unseres Sonnensystems ...
Mg-Ca, B-Ca and U-Ca in shells of benthic foraminifers
(Univ. Bremen, 2008)
Mg/Ca ratios in benthic foraminiferal shells are frequently used in paleoceanographic studies to estimate past bottom water temperatures. Apart from temperature, other factors may exert additional influences on foraminiferal ...
Johann Heinrich Lamberts Cosmologische Briefe
(Univ. Bremen, 2007)
Lambert, cosmological letters, fixed stars, nebulae, island universe, teleology, teleological, enlightenment, enlightened, romanticism, romantic, hypothesis, physical-teleological, speculation, imagination, stability, solar ...
Aktive Regionen der Sonnenoberfläche und ihre zeitliche Variation in zweidimensionaler Spektro-Polarimetrie
(Univ. Potsdam, 2008)
Die Arbeit beschreibt die Analyse von Beobachtungen zweier Sonnenflecken in zweidimensionaler Spektro-Polarimetrie. Die Daten wurden mit dem Fabry-Pérot-Interferometer der Universität Göttingen am Vakuum-Turm-Teleskop auf ...
Periodic variability in active galactic nuclei
(Univ. Köln, 2008)
In this doctoral thesis, multi-frequency very long baseline interferometry observations together with multi-frequency total flux-density variability data of compact relativistic jets in active galactic nuclei are presented ...
Electron acceleration in a flare plasma via coronal circuits
(Univ. Potsdam, 2008)
The Sun is a star, which due to its proximity has a tremendous influence on Earth. Since its very first days mankind tried to "understand the Sun", and especially in the 20th century science has uncovered many of the ...
The ISO-2MASS AGN survey
(Univ. Bochum, 2006)
Bei der Suche nach AGN im Optischen/UV werden kaum staubgerötete Objekte gefunden. Jedoch ist vom Radio/Röntgen-Bereich die Existenz solcher AGN bekannt. Da der obskurierende Staub die absorbierte Energie im Infraroten ...
NanoSIMS analysis and high resolution electron microscopy of silicate stardust grains from red giant stars and supernova explosions
(Univ. Frankfurt (Main), 2009)
This thesis deals with the analysis of presolar silicates and oxides by high resolution mass spectrometry and electron microscopy techniques. This stardust was identified by its extreme oxygen isotopic anomalies, which ...
Magnetic coupling of the solar photosphere and chromosphere
(Univ. Freiburg (Breisgau), 2008)
The solar surface outside sunspots and active regions, i.e., the quiet Sun, shows the ubiquitous pattern of granulation in the photosphere. The quiet solar photosphere harbors small-scale magnetic structures inside and ...