Issues

 / 

1987

 / 

June

  

Reviews of topical problems


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)
BibTexBibNote ® (generic)BibNote ® (RIS) MedlineRefWorks
PT Journal Article
TI The hydromagnetic dynamo as the source of planetary, solar, and galactic magnetism
AU Zeldovich Ya B
FAU Zeldovich YB
AU Ruzmaikin A A
FAU Ruzmaikin AA
DP 10 Jun, 1987
TA Phys. Usp.
VI 30
IP 6
PG 494-506
RX 10.1070/PU1987v030n06ABEH002852
URL https://ufn.ru/en/articles/1987/6/c/
SO Phys. Usp. 1987 Jun 10;30(6):494-506

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

© 1918–2024 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions