My main interests are stellar winds and variability in hot stars. See the hot star page of the Landessternwarte for more information and the Hot Star Newsletter for news in the field of hot star research.
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:
My email address can be found here.