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Title:
The disk dynamo
Authors:
RUZMAIKIN, A. A.; TURCHANINOV, V. I.; ZELDOVICH, IA. B.; SOKOLOFF, D. D.
Affiliation:
AC(Akademiia Nauk SSSR, Institut Prikladnoi Matematiki, Moscow, USSR) AD(Moskovskii Gosudarstvennyi Universitet, Moscow, USSR)
Journal:
Astrophysics and Space Science, vol. 66, no. 2, Dec. 1979, p. 369-384.
Publication Date:
12/1979
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
DYNAMO THEORY, GALACTIC STRUCTURE, INTERSTELLAR MAGNETIC FIELDS, ROTATING FLUIDS, TURBULENT FLOW, ASTRONOMICAL MODELS, COSMOLOGY, DISKS (SHAPES), X RAY SOURCES
Bibliographic Code:
1979Ap&SS..66..369R

Abstract

The simplest alpha-omega dynamo in a thin disk is analyzed. If the antisymmetric helicity function alpha(z) (where z is a coordinate perpendicular to the disk plane) is smooth and limited, then the conditions for generating a magnetic field and the symmetry of the resulting solutions depend only on the form of alpha at the segment (O, h) where h is the half-thickness of the disk - and the value of the dimensionless dynamo number D. The old exact solutions of the disk alpha-omega dynamo are studied and new ones are found. The results can be of importance when applied to the problem of the generation of a magnetic field in galactic and turbulent disks appearing around some X-ray sources. 
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