Fraternali's research interests span from the study of local galaxies including the Milky Way to early galaxies located at cosmological distances. He has provided crucial contributions to our understanding of how galaxies grow through the acquisition of gas from their environment. He has helped to identify and characterise the physical processes that shape the evolution of galaxy scaling relations and govern stellar feedback in star-forming galaxies. He has the uncommon characteristic of working actively on both theory and observations.
Prof. Fraternali is currently leading a group of three PhD students and a postdoc. Since the beginning of his career, he has supervised more than twenty Master students and ten PhD students. All his former PhD students have continued in astronomy and astrophysics, and they are currently postdocs at major research institutions.