to the web pages of Martin Zwaan martin_mini . I am a fellow at the European Southern Observatory eso_logo_mini in Garching b. München garching_mini. Previously I was a postdoc at the University of Melbourne melbourne_mini, Australia, after I received my PhD at the Kapteyn Institute rug_mini in Groningen rug_mini . My research concentrates on gas in galaxies rug_mini , seen in emission rug_mini , and in absorption rug_mini .