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Simulations of magnetic fields in the cosmos
Author(s) -
Brüggen M.,
Hoeft M.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610597
Subject(s) - physics , intergalactic travel , magnetic field , astrophysics , galaxy , cosmic cancer database , galaxy cluster , astronomy , active galactic nucleus , redshift , quantum mechanics
The origin of large‐scale magnetic fields in clusters of galaxies remains controversial. The intergalactic magnetic field within filaments should be less polluted by magnetised outflows from active galaxies than magnetic fields in clusters. Therefore, filaments may be a better laboratory to study magnetic field amplification by structure formation than galaxy clusters, which typically host many more active galaxies. We present highly resolved cosmological adaptive mesh refinement simulations of magnetic fields in the cosmos and make predictions about the evolution and structure of magnetic fields in filaments. Comparing our results to observational evidence of magnetic fields in filaments suggests that amplification of seed fields by gravitational collapse is not sufficient to produce intergalactic medium fields. Finally, implications for cosmic ray transport and the impact of magnetic fields on delayed photons from gamma‐ray bursts are discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)