Iglesias, F. A.; Feller, A.; Nagaraju, K.; Solanki, S. K.: High-resolution, high-sensitivity, ground-based solar spectropolarimetry with a new fast imaging polarimeter. Astronomy and Astrophysics 590, A89 (2016)
Krishnappa, N.; Feller, A.: Precision in ground-based solar polarimetry: simulating the role of adaptive optics. Applied Optics 51 (33), pp. 7953 - 7961 (2012)
Singh, J.; Hasan, S. S.; Gupta, G. R.; Nagaraju, K.; Banerjee, D.: Spectroscopic Observation of Oscillations in the Corona During the Total Solar Eclipse of 22 July 2009. Solar Physics 270 (1), pp. 213 - 233 (2011)
Feller, A.; Iglesias, F. A.; Nagaraju, K.; Solanki, S. K.; Ihle, S.: Fast Solar Polarimeter: Description and First Results. In: Solar Polarization 7, Vol. 489, pp. 271 - 277 (Eds. Nagendra, K. N.; Stenflo, J. O.; Qu, Z. Q.; Sampoorna, M.). Astronomical Society of the Pacific, Utah, USA (2014)
Feller, A.; Krishnappa, N.; Pleier, O.; Hirzberger, J.; Jobst, P. J.; Schürmann, M.: Reflectivity, polarization properties, and durability of metallic mirror coatings for the European Solar Telescope. Proceedings of the SPIE, p. 84503U-84503U-11 (2012)
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
For PhD students whose project is already funded and who are applying for admission to the IMPRS, or for applicants who want to bring their own funding and their own project idea to the IMPRS.
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.
The Solar Lower Atmosphere and Magnetism (SLAM) group covers many exciting subjects in solar physics, focussing on the development and testing of highly novel solar instrumentation, reduction and analysis of highest quality solar observations, or improving and developing advanced techniques for the analysis of solar observations.