In an unsteady flow field pressure variations lead to aerodynamic loads on objects like spheres or disks. Under the assumption of inviscid flow, the potential flow theory is a suitable method to predict aerodynamic loads ...

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 ...

The ionosphere is a conductive layer of the Earth's atmosphere, characterised by the presence of free electrons. Through interaction with electromagnetic waves, it influences a wide spectrum of radio wave communications, ...

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 ...

Context: The corona of the Sun can be observed since 1932 with instruments occulting the solar disc. Only few years later it became clear that the corona is way hotter than the visible solar surface and since then, the ...

On the basis of the equations for stellar structure together with an equation of state, stellar models may be constructed. Using these stellar models, the effects of different parameters on the evolution and internal ...