Solar eruptions, numerical simulation and laboratory experiments
Prof. Dr. Jörg Büchner
(Max-Planck-Institut für Sonnensystemforschung, Göttingen)
Freitag/Friday, 2015-12-18, 14 c.t., EW-561
Eugene-Paul-Wigner Gebäude, Hardenbergstr. 36, 10623 Berlin
Zusammenfassung/Abstract:The Sun releases its thermonuclear energy not only in form of the well know and a seemingly constant flow of white light but also by a highly variable stream of non-visible electromagnetic radiation, by plasma flows and energetic particles. Altogether these energy flows form the external environmental conditions for the planet Earth now called the "Space Weather". The Space Weather conditions are highly variable - even more than the atmospheric weather conditions. The reason is that the sources of the Space Weather are eruptive energy releases from the Sun with the most prominent Solar Flares and called Coronal Mass Ejections (CMEs). The increasing social relevance of the Space Weather conditions has recently led to intensive efforts to understand of the reason of solar eruptions. We present the main existing models of solar eruptions as they actually are under development and demonstrate their verification by means of numerical simulations directly comparable with solar observations. We further compare these findings with the results of current laboratory eruption experiments carried out at the Princeton Plasma Physics Laboratory (MRX).