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http://dx.doi.org/10.5303/JKAS.2004.37.5.533

GENERATION OF MAGNETIC FIELDS IN COSMOLOGICAL SHOCKS  

MEDVEDEV MIKHAIL V. (Department of Physics and Astronomy, University of Kansas, Institute for Nuclear Fusion, RRC 'Kurchatov Institute')
SILVA LUIS O. (GoLP/Centro de Fisica de Plasmas, Instituto Superior Tecnico)
FIORE MASSIMILIANO (GoLP/Centro de Fisica de Plasmas, Instituto Superior Tecnico)
FONSECA RICARDO A. (GoLP/Centro de Fisica de Plasmas, Instituto Superior Tecnico)
MORI WARREN B. (Department of Physics and Astronomy, University of California)
Publication Information
Journal of The Korean Astronomical Society / v.37, no.5, 2004 , pp. 533-541 More about this Journal
Abstract
The origin of magnetic fields in the universe remains an outstanding problem in cosmology. We propose that these fields are produced by shocks during the large-scale structure formation. We discuss the mechanism of the field generation via the counter-streaming (Weibel) instability. We also show that these Weibel-generated fields are long-lived and weakly coupled to dissipation. Subsequent field amplification by the intra-cluster turbulence may also take place, thus maintaining the magnetic energy density close to equipartition.
Keywords
cosmology: large scale structure; magnetic fields; shock waves;
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