Blättern Fakultät für Physik (inkl. GAUSS) nach "Kneer, Franz Prof. Dr." Betreuer
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Analysis of short-period waves in the solar chromosphere
(2005-07-15)Short-period acoustic waves were suggested as the source of the mechanical heating of the solar chromosphere. In this work the connection of the waves with the sub-photosphere, the temporal ... -
Equatorial Coronal Holes and Their Relation to the High-Speed Solar Wind Streams
(2003-11-18)The heating of the solar corona and the origin and acceleration of the solar wind are among the important unsolved problems of space plasma and solar physics. Coronal holes (CHs) have been ... -
Kleinskalige Magnetfelder der Sonne und ihr Einfluß auf Chromosphäre, Übergangszone und Korona
(2001-09-21)During coordinated international observation campaign with the ground-based telescopes GCT (Gregory-Coudé-Telescope) and VTT (Vacuum-Tower-Telescope) and the UV/EUV Telescope SUMER ... -
Magnetic Activity at the Poles of the Sun
(2008-11-11)This work sheds light on the role of polar faculae with respect to the global magnetic field of the Sun, on the basis of high spatial resolution spectropolarimetric observations, while ... -
Multi-dimensional Polarized Radiative Transfer Modeling of Titan's Atmosphere
(2003-07-25)The primary purpose of this thesis work is to develop a multi-dimensional radiative transfer model, which includes polarization, for Titan"s atmosphere and to validate this model. The model ... -
Multi-wavelength Observations of Coronal Waves and Oscillations in Association with Solar Eruptions
(2011-08-11)This thesis presents an observational study of the relationship between flares and filament eruptions, and associated waves and oscillations in flare loops and ambient corona. A detailed ... -
Observations and modeling of polar faculae on the Sun
(2004-12-21)In this work the structure and dynamics of polar faculae on the Sun, which constitute an important part of the magnetic solar cycle, were studied by means of high resolution spectropolarimetric ... -
Quiet Sun Magnetic Fields
(2004-11-03)The aim of this Thesis is the study of the quiet Sun magnetic fields. They are characterized by weak polarization signals due to their small-scale coverage of the solar surface, but with the availability of new, high-sensitivity ... -
Simulationsrechnungen anisoplanatischer Übertragungsfunktionen für solare Adaptive Optik
(2006-11-06)With the Adaptive Optics (AO) System KAOS (Kiepenheuer Adaptive Optics System), installed at the Vacuum-Tower-Telescope (VTT) on Tenerife (Spain) and developed at the Kiepenheuer-Institut ... -
Spectropolarimetry of sunspot penumbrae
(2007-01-03)This work presents a detailed study of the fine structure of sunspot penumbrae by means of observations with high spatial resolution and forward modelling. The use of image reconstruction ... -
Spektroskopie und Polarimetrie kleinskaliger magnetischer Strukturen der Sonnenoberfläche mit Methoden der Bildrekonstruktion
(2001-07-18)Speckle observations of small-scale magnetic structures on the Sun are presented. They were obtained with the Göttingen Fabry-Perot interferometer (FPI) in the Vacuum Tower Telescope at the ... -
Struktur und Dynamik kleinskaliger Magnetfelder der Sonnenatmosphäre
(2003-07-25)Two-dimensional spectrograms were obtained at the Vacuum Tower Telescope, Tenerife, in order to study the structure of small scale magnetic fields on the Sun. The speckle reconstruction ... -
Untersuchung polarer Fackeln mittels Bildrekonstruktion und Inversionstechniken
(2001-08-15)With both German Solar Telescopes in Tenerife polar faculae were observed in the FeI Lines of 630,15 and 630,25 nm. Out of the GCTs data an analytical model of the dependence of the Parameters ...