  Magnetic fields are one of most concealed components of the universe. They
are observed as part of the intergalactic medium and on galaxy cluster scales,
however their origin and evolution is unclear. In this work we use the
IllustrisTNG simulation to investigate the effects of magnetic fields in cosmic
voids, the least dense regions of the universe. We find that, under the
hypothesis of a uniform primordial magnetic field, the voids still reflect the
primordial properties of the fields. On the other hand, the galaxies in their
interior acquire weaker magnetic fields than galaxies in denser environments.

Astrophysics of Galaxies;Cosmology and Nongalactic Astrophysics