Theoretical astroparticle physics

Particle physics is linked in many ways to fundamental questions about the universe. What is the “dark matter” that determines the dynamics of galaxies and cosmic structures made of? What influence do neutrinos or the new dark matter particles have on the evolution of stars, especially on supernova explosions? What can we learn about questions of fundamental particle physics from astronomical and cosmological observations? 

The theoretical astroparticle group deals with some of these fundamental questions. A central topic is the investigation of the influence of neutrinos on supernova explosions, in particular the role of “neutrino plasma” and its collective properties in such extreme astrophysical systems and in merging neutron stars. A particular focus is on investigations into the role of novel particles that interact even more weakly than neutrinos as candidates for dark matter. Examples include axions and sterile neutrinos. Furthermore, the group combines findings from astrophysical and cosmological observations with the results of Earth-based experiments in order to maximize our knowledge of particle physics.