Magnetic field amplification in accretion discs around the first stars: implications for the primordial IMF.

ABSTRACT: Magnetic fields play an important role in the dynamics of present-day molecular clouds. Recent work has shown that magnetic fields are equally important for primordial clouds, which form the first stars in the Universe. While the primordial magnetic field strength on cosmic scales is largely unconstrained, theoretical models strongly suggest that a weak seed field existed in the early Universe. We study how the amplification of such a weak field can influence the evolution of accretion discs around first stars, and thus affect the primordial initial mass function (IMF). We perform a suite of 3D ideal magneto-hydrodynamic simulations with different initial field strengths and numerical resolutions. We find that, in simulations with sufficient spatial resolution to resolve the Jeans scale du

SUBMITTER: Sharda P 

PROVIDER: S-EPMC7987533 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature