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When observing Active Regions, a variety of different structures can be identified on the solar surface. Among them are the umbra and penumbra of sunspots, pores, orphan penumbrae, etc. In each of these, the moving solar plasma and the magnetic field interact in a different way and convection is...

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Sunspots play an important role in understanding the dynamical nature of the solar magnetic field. Although their surface appearance has been observed for over four centuries, little is known about the subsurface structure. Sunspots are known to strongly influence solar acoustic modes and there is a...

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Mit zunehmender Größe der Apertur eines Teleskops steigt auch die theoretisch mögliche Auflösung der Beobachtung. Dies führt dazu, dass kleinere Strukturen und Phänomene beobachtet werden können, welche bisher unentdeckt blieben. Mithilfe des GREGOR-Teleskops können nun Aufnahmen gemacht werden, die...

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Standard algorithms for tracking small scale magnetic features suffer
from ambiguities due to the intrinsic complexity of the feature
interactions which are driven by photospheric convective motions.

In his Ph.D. work, Andrei Gorobets will work on an alternative concept
for tracking the evolution...

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