We obtained simultaneously recorded time series of broadband images of a sunspot close to the disk center at the German Vacuum Tower Telescope, Tenerife, in two...

Time series of high-resolution white-light images of solar pores are analyzed. Granular motions in the vicinity of pores are driven by mesogranular flows...

Two inversion techniques are compared: the Unno-Rachkov-sky fitting method (UR) and the Stokes Inversion based on Response functions (SIR). Results with...

Context. Imaging spectrographs are popular instruments used to obtain solar data. They record quasi-monochromatic images at selected wavelength positions. By...

Context. The use of instruments that record narrowband images at selected wavelengths is a common approach in solar observations. They allow scanning of a...

Umbral dots (UDs) are transient, bright features observed in the umbral region of a sunspot. We study the physical properties of UDs observed in sunspots of...

Chromospheric umbral oscillations produce periodic brightenings in the core of some spectral lines, known as umbral flashes. They are also accompanied by...

A systematic structuring of magnetic fields over scales much smaller than the mean free path of photospheric photons may be responsible for the observed...

One important feature of sunspots is the presence of light bridges. These structures are elongated and bright (as compared to the umbra) features that seem to...