leader prof. Druckmüller
Members: Miloslav Druckmüller, Pavel Štarha, Jana Hoderová, Hana Druckmüllerová, Pavel Mikuláček
Research Focus:
The research group focuses on following areas of space research:
The scientific group mainly deals with applied research in the field of numerical methods of digital image analysis. Long-term cooperation (since 2007) with the team of prof. Shadia Habbal is essential for the group's work. Shadia Habbal is the leading person of the solar corona research at the Institute for Astronomy, University of Hawaii.
The task of the mathematicians from the Institute of Mathematics FME BUT in Brno is not only mathematical processing of experimental data, which are images of the solar corona obtained by space probes SDO (NASA, Solar Dynamics Observatory), SOHO (NASA, ESA Solar and Heliospheric Observatory), STEREO (NASA, Solar Terrestrial Relations Observatory) and Solar Orbiter (ESA, NASA), but also acquisition and processing of data obtained during total solar eclipses.
Together with the University of Hawaii, more than 50 scientific papers were created, some of which contain important discoveries in the field of solar physics, such as the discovery of previously unknown structures in the solar corona caused by various plasma instabilities, finding the boundary between collisional and collisionless plasma, finding that coronal cavities above the prominences are filled with hot plasma and creating the first temperature map of the solar corona based on observations of Fe and Ni ions. Newly developed mathematical methods of image processing and analysis played a crucial role in all of the above discoveries.
A world-leading position has been achieved by the team in the research of Fe and Ni forbidden lines in the solar corona in the visible and near-infrared parts of the spectrum during total solar eclipses. Numerical methods NAFE (Noise Adaptive Fuzzy Equalization, Druckmüller) and MGN (Multi-Scale Gaussian Normalization, Morgan, Druckmüller) have become standard methods for visualizing of images taken by the SDO space probe in the EUV region of the spectrum.
Analysis of movements and changes in digital images is a new area in which the team has expanded its research. The first published result is the determination of the differential rotation of the Sun based on images from the HMI detector of the SDO space probe with a time step of 45 s. This was made possible by developing a new high-precision modification of the phase correlation method.
http://www.zam.fme.vutbr.cz/~druck/Eclipse/index.htm
http://www.zam.fme.vutbr.cz/~druck/SDO/Pm-nafe/Archive.htm