NLTE Radiative Transfer

Radiation transport in stellar atmospheres and fundamental methods of astro-physical spectroscopy. More ...

Cosmic Chemical Evolution

Understanding the cosmic origins of the periodic table from the analysis of abundance fingerprints in stellar spectra. More ...back in giant H II-regions.

Stellar Populations in Galaxies

Evolution of stellar populations, from star clusters to the Milky Way and star-forming galaxies. More ... 

Exoplanet hosts

Chemical analysis is a new method to find stars with exoplanets and to study the formation of the Solar System. More...

Large-scale stellar surveys

Development of new statistical methods for the analysis of  million datasets of stellar spectra. More …