Primordial Magnetic Fields: Reionization Constraints and Implications for the First Stars

摘要

We discuss possible implications of strong primordial magnetic fields, which may have been created during cosmic inflation or the QCD / electroweak phase transition. and explore how they influence the epoch of reionization and primordial star timnation. Globally, magnetic fields may delay reionization, as the magnetic pressure suppresses gravitational collapse in small halos. In the protostellar collapse phase, we find that ambipolar diffusion heating does not change the fragmentation mass scale significantly, but may enhance the accretion rate at higher densities.