 As an art historian, his major works were the fundamental studies of the art of Johan Christian Dahl which won him an annual government scholarship in 1895 and ended his teaching career.He became a professional art historian, critic and researcher.Aubert also championed Edvard Munch, Puvis de Chavannes, Arnold Böcklin, Max Klinger, Gabriel von Max, and Vilhelm Hammershøi.