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This article is cited in 3 scientific papers (total in 3 papers)
PHYSICS OF OUR DAYS
Magnetic helicity and prospects for its observation in the interstellar medium
R. A. Stepanovab, D. D. Sokoloffcd a Institute of Continuous Media Mechanics, Ural Branch of the Russian Academy of Sciences, Perm
b Perm National Research Polytechnic University
c Faculty of Physics, Lomonosov Moscow State University
d Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow
Abstract:
Magnetic helicity is one of the integrals of nonviscous flows in magnetohydrodynamics that determines the number of linkages of magnetic field lines in a medium. It is among a number of helicities that characterize the degree of mirror asymmetry of velocity and magnetic fields. The helicities play a crucial role in driving the generation of large-scale magnetic fields in stars and spiral galaxies. Until recently, measurements of various helicities were based on astronomical observations of the Sun's active regions, but not in the Sun's deep layers where the solar dynamo is operative. Galaxies are transparent to some extent and are therefore very attractive in this sense for observing the helicity of its magnetic field. Theoretical advances and the first successful attempts at such observations are reviewed.
Received: November 12, 2018 Accepted: December 19, 2018
Citation:
R. A. Stepanov, D. D. Sokoloff, “Magnetic helicity and prospects for its observation in the interstellar medium”, UFN, 189:12 (2019), 1285–1291; Phys. Usp., 62:12 (2019), 1208–1213
Linking options:
https://www.mathnet.ru/eng/ufn6431 https://www.mathnet.ru/eng/ufn/v189/i12/p1285
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