Statistics – Computation
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..309t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 309-321. Research supported by NSF and DOE.
Statistics
Computation
60
Cosmology, Magnetic Fields, Magnetohydrodynamics, Space Plasmas, Universe, Computational Astrophysics, Computerized Simulation, Energy Spectra
Scientific paper
The paper shows that a plasma with temperature T sustains fluctuations of electromagnetic fields and particle density even if it is assumed to be in a thermal equilibrium. The level of fluctuations in the plasma for a given wavelength and frequency of electromagnetic fields is rigorously computed by the fluctuation-dissipation theorem. A large zero-frequency peak of electromagnetic fluctuations is discovered. It is shown that the energy contained in this peak is complementary to the energy 'lost' by the plasma cutoff effect. The present computer particle simulation confirms the theory and exhibits a peaking of the magnetic energy spectrum at zero frequency. The level of magnetic fields is significant at the early radiation epoch of the universe. Such magnetic fluctuations provide seed fields for later evolution. Implications of these magnetic fields in the early universe are discussed.
Cable Samuel
Kulsrud Russell M.
Shibata Kazunari
Tajima Toshiki
No associations
LandOfFree
On the origin of cosmological magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the origin of cosmological magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the origin of cosmological magnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1514325