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Intermittent Magnetic Fields Generated by Turbulence in Galaxies and Galaxy Clusters

Published online by Cambridge University Press:  19 July 2016

D.D. Sokoloff ,
A.A. Ruzmaikin  and
A. Shukurov
D.D. Sokoloff
Affiliation:
Physics Department, Moscow University, Moscow 119899, USSR
A.A. Ruzmaikin
Affiliation:
IZMIRAN, Troitsk, Moscow Region 142092, USSR
A. Shukurov
Affiliation:
IZMIRAN, Troitsk, Moscow Region 142092, USSR

Abstract

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The turbulence of intracluster gas in galaxy clusters and interstellar gas in galaxies can act as a dynamo generating chaotic magnetic fields. These fields are concentrated in ropes with the doubled radius of curvature of about the turbulent correlation length l and thickness where Rm is the magnetic Reynolds number. The field strength within the ropes is close to equipartition with turbulent kinetic energy. These results favorably agree with high—resolution observations of the galaxy cluster around Cyg A and correlation analysis of the Galactic nonthermal background. Ropy magnetic fields in interstellar gas lead to observable variations of, e.g., the Faraday depth at time scale of 1 month.

Type
9. Magnetic Fields in the Galactic Environment, Galaxy Clusters and Intergalactic Medium
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 499 - 503
Copyright
Copyright © Kluwer 1990 

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