The hydromagnetic dynamo as the source of planetary, solar, and galactic magnetism

The magnetism of most celestial bodies, i.e., planets, stars, and galaxies, is of hydromagnetic origin. The turbulent hydromagnetic dynamo is the principal mechanism whereby the magnetic field is amplified and maintained, and the theory of this phenomenon has advanced significantly in recent years. This review discusses applications of the theory of the turbulent dynamo to real objects, taking the Sun, the Earth, and the Galaxy as examples. Most of the discussion is concentrated on the large-scale magnetic field averaged over turbulent fluctuations. The average field is amplified and maintained by the average helicity of turbulent motion and large-scale shear flows such as differential rotation. The dynamo theory explains striking phenomena such as geomagnetic field reversal, the solar cycle, and the ring and bisymmetric structure of spiral galaxies.

PACS: 91.25.Mf, 96.12.Hg, 96.15.Gh, 96.60.Hv, 98.35.Eg (all)
DOI: 10.1070/PU1987v030n06ABEH002852
URL: https://ufn.ru/en/articles/1987/6/c/
Citation: Zeldovich Ya B, Ruzmaikin A A "The hydromagnetic dynamo as the source of planetary, solar, and galactic magnetism" Sov. Phys. Usp. 30 494–506 (1987)

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Оригинал: Кузелев М В, Рухадзе А А «Вынужденное излучение сильноточных релятивистских электронных пучков» УФН 152 285–316 (1987); DOI: 10.3367/UFNr.0152.198706d.0285

References (48) Cited by (46) Similar articles (20) ↓

L.S. Bogdankevich, M.V. Kuzelev, A.A. Rukhadze “Plasma microwave electronics” Sov. Phys. Usp. 24 1–16 (1981)
S.A. Molchanov, A.A. Ruzmaikin, D.D. Sokolov “Kinematic dynamo in random flow” Sov. Phys. Usp. 28 307–327 (1985)
M.V. Kuzelev, A.A. Rukhadze “Spontaneous and stimulated emission induced by an electron, electron bunch, and electron beam in a plasma” Phys. Usp. 51 989–1018 (2008)
L.S. Bogdankevich, A.A. Rukhadze “Stability of relativistic electron beams in a Plasma and the problem of critical currents” Sov. Phys. Usp. 14 163–179 (1971)
Ya.B. Zel’dovich, S.A. Molchanov et al “Intermittency in random media” Sov. Phys. Usp. 30 353–369 (1987)
M.V. Fedorov “Interaction of electrons with the electromagnetic field in free electron lasers” Sov. Phys. Usp. 24 801–814 (1981)
S.I. Vainshtein, Ya.B. Zel’dovich “Origin of Magnetic Fields in Astrophysics (Turbulent ’Dynamo’ Mechanisms)” Sov. Phys. Usp. 15 159–172 (1972)
E.P. Popova “Current results on the asymptotics of dynamo models” Phys. Usp. 59 513–530 (2016)
A.B. Severnyi “Magnetic fields of the Sun and stars” Sov. Phys. Usp. 9 1–30 (1966)
M. Birau, M.A. Krasil’nikov et al “Problems in the theory of relativistic plasma microwave electronics” Phys. Usp. 40 975–992 (1997)
S.F. Shandarin, A.G. Doroshkevich, Ya.B. Zel’dovich “The large-scale structure of the universe” Sov. Phys. Usp. 26 46–76 (1983)
Ya.B. Zeldovich, V.S. Popov “Electronic structure of superheavy atoms” Sov. Phys. Usp. 14 673–694 (1972)
V.V. Malakhov, V.V. Alekseev et al “Magnetic field in the inner near-Earth space” Phys. Usp. 66 967–986 (2023)
A.Z. Dolginov “Origin of the magnetic fields of the earth and celestial bodies” Sov. Phys. Usp. 30 475–493 (1987)
O.G. Onishchenko, O.A. Pokhotelov, N.M. Astaf’eva “Generation of large-scale eddies and zonal winds in planetary atmospheres” Phys. Usp. 51 577–589 (2008)
S.B. Pikel’ner “Dynamics of the solar atmosphere” Sov. Phys. Usp. 9 236–250 (1966)
Ya.B. Zel’dovich, A.L. Buchachenko, E.L. Frankevich “Magnetic-spin effects in chemistry and molecular physics” Sov. Phys. Usp. 31 385–408 (1988)
B.P. Filippov “Mass ejections from the solar atmosphere” Phys. Usp. 62 847–864 (2019)
Ya.B. Zel’dovich “Interaction of free electrons with electromagnetic radiation” Sov. Phys. Usp. 18 79–98 (1975)
Ya.B. Zel’dovich “The cosmological constant and the theory of elementary particles” Sov. Phys. Usp. 11 381–393 (1968)

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