My main interests are stellar winds and variability in hot stars. See the hot star page of the Landessternwarte for more information.
In addition, I work on instrumentation projects, presently the Carmenes instrument.
The spectral atlas of the Luminous Blue Variable P Cygni, based on data published in Astron Astrophys. Suppl. 99, 167, is a useful resource for line identification in early-type emission-line stars.
In the past, I have worked on data reduction software for several astronomical instruments: