Magnetic-Field Concentration and the Twisted Solar Coronal Loops

The magnetostatic equilibrium of axisymmetric, cylindrical magnetic flux ropes in the solar corona is considered. The conditions for the concentration of strong (hundreds of gauss) magnetic fields in neutralized (shielded) and non-neutralized (unshielded) flux ropes in which the azimuthal component...

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Bibliographic Details
Published inGeomagnetism and Aeronomy Vol. 61; no. 7; pp. 1052 - 1056
Main Authors Tsap, Yu. T., Stepanov, A. V., Kopylova, Yu. G.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2021
Springer Nature B.V
Subjects
Corona
Coronal loops
Earth and Environmental Science
Earth Sciences
Fluctuations
Geophysics/Geodesy
Magnetic fields
Magnetic flux
Magnetism
Solar corona
Solar magnetic field
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Summary:The magnetostatic equilibrium of axisymmetric, cylindrical magnetic flux ropes in the solar corona is considered. The conditions for the concentration of strong (hundreds of gauss) magnetic fields in neutralized (shielded) and non-neutralized (unshielded) flux ropes in which the azimuthal component of the magnetic field in the outer region is either, respectively, zero or continuous on the boundary lateral surface, are discussed. On the example of the generalized, force-free, magnetic Gold–Hoyle configuration, it is shown that non-neutralized flux ropes, in contrast to neutralized ones, are capable of providing a magnetic-field concentration tens of times higher than the background field values at a relatively low (<10) number of turns of magnetic-field lines around the tube axis. The origin of twisted magnetic fields in the solar corona is discussed based on the results.
ISSN:0016-7932
1555-645X
0016-7940
DOI:10.1134/S0016793221070203