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Title:		Dynamo problems in astrophysics
Authors:		ZELDOVICH, IA. B.; RUZMAIKIN, A. A.
Affiliation:		AB(Akademiia Nauk SSSR, Institut Prikladnoi Matematiki, Moscow, USSR)
Journal:		Soviet Scientific Reviews, Section E: Astrophysics and Space Physics Reviews (ISSN 0143-0432), vol. 2, 1983, p. 333-383. Translation.
Publication Date:		00/1983
Category:		Astrophysics
Origin:		STI
NASA/STI Keywords:		ASTROPHYSICS, DYNAMO THEORY, MAGNETOPLASMADYNAMICS, GEOMAGNETISM, HIGH REYNOLDS NUMBER, MAGNETOHYDRODYNAMICS, PLANETARY MAGNETIC FIELDS, SOLAR ACTIVITY, STRANGE ATTRACTORS, TURBULENCE
Bibliographic Code:		1983SSRvE...2..333Z

Abstract

Some current topics in hydromagnetic dynamo theory are discussed in the astrophysical context of large magnetic Reynolds number. Criteria are defined for field generation in a state of near-complete freezing-in. An account is given of certain qualitative aspects of a turbulent dynamo operating through nonuniform rotation of a conducting medium subject to random motions with helicity. Such dynamos might be at work in planetary cores, stellar envelopes, galaxies, and the gaseous accretion disks around X-ray sources. The concepts of stochasticity and strange attractors in a magnetic dynamo are examined, and a qualitative interpretation is offered for the occasional prolonged interruptions of the solar activity cycle, such as the Maunder minimum.

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