Author: Marcela BodnárováWe studied spectroscopic signatures of potential means of energy transport into the chromosphere by investigating temporal variations of the width, the intensity and the Dopplershift of the Hα spectral line profile observed by th ... more
Author: Ângela R. G. SantosThe frequencies of the solar oscillations are known to vary in phase with the Sun's activity level. The solar cycle is accompanied by changes in the overall magnetic field as well as in the area covered by active regions, which c ... more
Author: Antonio García HernándezIn the work we present here, we empirically demonstrate that a simple relation exists between a periodic pattern present in the frequency spectra of Delta Scuti stars and their mean density. This relation is homologous to that of ... more
Author: Markus RothThis presentation was given at the Solar Orbiter Science Activity Plan Meeting #4.
It is a review on the techniques and achievements of helioseismology during the last decades.
Furthermore, it gives an outlook on the science to ... more
Author: Michal SobotkaA small flare ribbon above a sunspot umbra in active region 12205 was observed on November 7, 2014, at 12:00 UT in the blue imaging channel of the 1.5-m GREGOR telescope, using a 1 A Ca II H interference filter. Context observatio ... more
Author: Markus RothPresentation given at 11th European Space Weather Week by Alexei Pevtsov
PRING is a project to develop a geographically distributed network of instrumentation to obtain synoptic solar observations. Building on the demonstrated ... more