Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000rmxac...9...92b&link_type=abstract
"Astrophysical Plasmas: Codes, Models, and Observations, Proceedings of the conference held in Mexico City, October 25-29, 1999,
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
Explaining the origin of magnetic fields in astrophysical bodies has long been a challenge for theorists. While mean field dynamo theory has been developed for a while this theory runs into several problems. The rapid growth of small scale magnetic fields which were thought to quench the emergence of larger scale fields was thought to be a major problem. A way out of this dilemma exists through invoking the theory of fast dynamos. However, the problem with fast dynamos is that the theory cannot be developed as much as one would like, making it necessary to rely on simulations. We provide simulations of dynamos with adequate resolution to have a separation of scales. Dynamo solutions are shown to be possible with magnetic fields growing rapidly on all scales including those larger than the forcing length scales. We discuss the energy bearing structures and spectra of such dynamos.
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