Abstract
To model irregularities in the magnetic structure of solar flux ropes or in interplanetary magnetic clouds, we propose the following approach. A local irregularity in the form of a compact toroid is added into a cylindrical linear force-free magnetic structure. The radius of the cylinder and the small radius of the toroid are the same, since the force-free parameter α is constant, that is, we have in total a linear force-free configuration, too. Meanwhile, the large radius of the toroid can be smaller. The effect of such modeling depends on the aspect ratio of the compact toroid, its location and orientation, and on its magnetic field magnitude in comparison with that of the cylinder.
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Acknowledgements
This work was supported by the program of the Czech–US collaboration in science and technology (ME09032). MV acknowledges support from the AV ČR grant RVO:67985815 and by the GA ČR grant 205/09/0170.
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Flux-Rope Structure of Coronal Mass Ejections
Guest Editors: N. Gopalswamy, T. Nieves-Chinchilla, M. Hidalgo, J. Zhang, and P. Riley
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Romashets, E., Vandas, M. Modeling Irregularities in Solar Flux Ropes. Sol Phys 284, 235–243 (2013). https://doi.org/10.1007/s11207-012-0083-9
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DOI: https://doi.org/10.1007/s11207-012-0083-9