Traces of Periodicity in the Observational Data on Magnetic Fields of Celestial Bodies and the Dynamo Models
- Authors: Sokoloff D.D.1, Shibalova A.S.1
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Affiliations:
- Physics Department, Moscow State University
- Issue: Vol 58, No 7 (2018)
- Pages: 888-892
- Section: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/157020
- DOI: https://doi.org/10.1134/S0016793218070198
- ID: 157020
Cite item
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.
About the authors
D. D. Sokoloff
Physics Department, Moscow State University
Author for correspondence.
Email: sokoloff.dd@gmail.com
Russian Federation, Moscow, 119991
A. S. Shibalova
Physics Department, Moscow State University
Author for correspondence.
Email: as.shibalova@physics.msu.ru
Russian Federation, Moscow, 119991
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