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Geomagnetism and Aeronomy

, Volume 58, Issue 7, pp 888–892 | Cite as

Traces of Periodicity in the Observational Data on Magnetic Fields of Celestial Bodies and the Dynamo Models

  • D. D. SokoloffEmail author
  • A. S. ShibalovaEmail author
Article
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Abstract

From the viewpoint of dynamo theory, periodic behavior of the magnetic field is interpreted as a manifestation of the eigenmode in magnetohydrodynamic equations describing the dynamo. The alternative explanation is that we are dealing with a demonstration of different fluctuations of the dynamo control parameters rather than with a periodic process. A simplified geodynamo model is considered; it is able to reproduce a scale of inversions that is similar to the real scale and a priori does not describe excitations of a periodically varying magnetic field. The analysis shows that, according to the currently available data on the scale of geomagnetic field polarities, the presence of a eigen frequency corresponding to a period of about 50 Ma is not fixed in the geodynamo problem.

Notes

ACKNOWLEDGMENTS

This work was partially supported by the Russian Foundation for Basic Research, projects 18-02-00085 and 18-52-06002.

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Physics Department, Moscow State UniversityMoscowRussia

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