Cosmic filament dynamos

STASYSZYN, FEDERICO; PAZ, DANTE; VAZZA, FRANCO

Cartagena

Congreso; XV Latin American Regional IAU Meeting; 2016

Universidad Nacional De Colombia

The use of Smoothed Particle Magneto Hydrodynamics (SPHMHD) is getting nowadays more and more common in Astrophysics. From galaxy clusters to neutron starts, there are multiple applications already existing in the literature. I will review some of the common methods used and highlight the successful approach of using vector potentials to describe the evolution of the magnetic fields (Stasyszyn and Elstner, 2015). The latter have some interesting advantages, and their results challenge previous findings, being the magnetic divergence problem naturally vanished.  In particular, the dynamical building of the structures as cosmic filaments, encode a velocity field that is compatible with dynamo action. The observation imprints of the magnetic fields derived from this assembly process, not only are predictions for SKA  observations, but also will give us a hint of the dynamics of the galaxies in and around filaments. This demonstrates the use of magnetic field evolution results, to constrain the cosmological dynamics of the barions as a whole in the Universe.