Browsing Fakultät für Physik (inkl. GAUSS) by Advisor & Referee "Gizon, Laurent Prof. Dr."
Now showing items 21-28 of 28
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Non-axisymmetric Magnetic Flux Transport in the Sun
(2018-02-01)The solar magnetic field drives a wide range of phenomena, from sunspots to flares and coronal mass ejections. This field is maintained against ohmic dissipation by means of a hydromagnetic dynamo. In recent years, evidence ... -
Magnetohydrodynamic Simulation of Reconnection in Turbulent Astrophysical Plasmas
(2016-08-31)Turbulence is ubiquitous at large-Reynolds-number astrophysical plasmas like in the Solar corona. In such environments, the turbulence is thought to enhance the energy conversion rate by magnetic reconnection above ... -
Differential rotation in Sun-like stars from surface variability and asteroseismology
(2016-07-15)Thanks to helioseismology we know the internal rotation of the Sun as a function of radius and latitude. The presence of a shear at the base of the solar convection zone is thought to play a key role in the generation of ... -
Simulating the signature of starspots in stellar oscillations
(2016-04-14)It has been known for a few decades that acoustic oscillations are affected by stellar activity. In the case of the Sun global acoustic modes show a variation with the 11-year cycle and a similar phenomenon has been observed ... -
Data Compression for Helioseismology
(2015-10-22)Efficient data compression will play an important role for several upcoming and planned space missions involving helioseismology, such as Solar Orbiter. Solar Orbiter, to be launched in October 2018, will be the next ... -
Measuring vortical flows in the solar interior
(2015-09-28)This thesis focuses on observations of the effects of rotation on solar convection at the length scales of supergranulation and larger (>30 Mm). Rotation drives vortical flows through the Coriolis force and causes anisotropic ... -
Analysis of small scale solar magnetic fields using Hinode SOT/SP
(2014-07-23)This thesis presents an analysis of small magnetic structures found in the solar photosphere. All the work presented in the following chapters is primarily based on data obtained from the spectropolarimeter aboard the ... -
Analysis of time series of solar-like oscillations - Applications to the Sun and HD52265
(2011-08-25)The study of stellar oscillations allows one to constrain the structure and dynamics of stellar interiors to a precision that cannot be achieved with other methods. This dissertation focusses ...