Current Main Research Interests
Young stellar objects
Very distant (young) galaxies
Active galaxies and QSOs
Massive luminous stars
Cosmic X-ray sources
Some personal information can be found in a brief
English CV . If you prefer a German CV please click
The following links provide access to lists of my scientific papers.
Depending on what you are interested in, please click either
on papers in refereed scientific journals
or on invited reviews and lectures .
An (incomplete) list of other publications can be found under "other papers" .
To get a list of my books click on books .
Many of the more recent publications in refereed journals can be accessed via ADS . Some of the papers that are still in press are available on the astro-ph preprint server .