Thesis project presentation: Origin of solar surface activity and sunspots

by Ms Sarah Jabbari (PhD student)

Thursday 8 Nov 2012, 13:30 → 14:00 Europe/Stockholm

122:026

In recent years, the negative effective magnetic pressure instability (NEMPI) has emerged as a potentially important mechanism for concentrating magnetic flux locally in certain regions of the Sun during the course of the solar dynamo cycle. These regions range from active regions that live for one or several rotation periods to active longitudes that can live for years. The purpose of the thesis is to put this new proposal to more stringent tests, examine properties of NEMPI under more realistic conditions and to study in detail the effects of turbulent heat flux suppression by local magnetic field enhancements that are believed to lead to an instability and perhaps to the formation of sunspots.