Magnetic fields in the Large-Scale Structure of the Universe
  Magnetic fields appear to be ubiquitous in astrophysical environments. Their
existence in the intracluster medium is established through observations of
synchrotron emission and Faraday rotation. On the other hand, the nature of
magnetic fields outside of clusters, where observations are scarce and
controversial, remains largely unknown. In this chapter, we review recent
developments in our understanding of the nature and origin of intergalactic
magnetic fields, and in particular, intercluster fields. A plausible scenario
for the origin of galactic and intergalactic magnetic fields is for seed
fields, created in the early universe, to be amplified by turbulent flows
induced during the formation of the large scale structure. We present several
mechanisms for the generation of seed fields both before and after
recombination. We then discuss the evolution and role of magnetic fields during
the formation of the first starts. We describe the turbulent amplification of
seed fields during the formation of large scale structure and the nature of the
magnetic fields that arise. Finally, we discuss implications of intergalactic
magnetic fields.
