Zeuner, F.; Feller, A.; Iglesias, F. A.; Solanki, S. K.: Detection of spatially structured scattering polarization of Sr I 4607.3 Å with the Fast Solar Polarimeter. Astronomy and Astrophysics 619, A179 (2018)
Zeuner, F.; Feller, A.; Iglesias, F.; Milic, I.; Solanki, S. K.: Spatially resolved Stokes measurements in the Sr I (4607.3 Å) line with FSP at VTT/TESOS. SOLARNET IV: The Physics of the Sun from the Interior to the Outer Atmosphere, Lanzarote, Spain (2017)
Zeuner, F.; Feller, A.; van Noort, M.; Iglesias, F.; Reardon, K.: Fast dual-beam spectropolarimetry - first results on scattering polarization measurements with FSP II at the DST. AG 2017 HiRes Splinter, Göttingen, Germany (2017)
Zeuner, F.: High resolution scattering spectropolarimetry of the quiet solar photosphere. Dissertation, 145 pp., Georg-August-Universität Göttingen, Göttingen (2020)
Analyzing the high spatial resolution solar Ca II H and K emission data obtained by the SUNRISE mission and building a model of other stars more active than the Sun
The magnetic field in the solar atmosphere exceeds the geomagnetic field strength by four orders of magnitude. It greatly influences the processes of energy transport within the solar atmosphere, and dominates the morphology of the solar chromosphere and corona. Kinetic energy from convective motions in the Sun can be efficiently stored in magnetic fields and subsequently released - to heat the solar corona to several million degrees or to blast off coronal mass ejections.
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.
First icy cold, then midnight sun: at the Arctic Circle, the team will prepare the next flight of the balloon-borne solar observatory - and hopes for solar fireworks.