Nonlinear Generation of Fluting Perturbations by Kink Mode in a Twisted Magnetic Tube
We study the excitation of fluting perturbations in a magnetic tube by an initially imposed kink mode. We use the ideal magnetohydrodynamic (MHD) equations in the cold-plasma approximation. We also use the thin-tube approximation and scale the dependent and independent variables accordingly. Then we...
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| Veröffentlicht in: | Solar physics 2022-09, Vol.297 (9), Article 116 |
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| creator | Ruderman, M. S. Petrukhin, N. S. |
| description | We study the excitation of fluting perturbations in a magnetic tube by an initially imposed kink mode. We use the ideal magnetohydrodynamic (MHD) equations in the cold-plasma approximation. We also use the thin-tube approximation and scale the dependent and independent variables accordingly. Then we assume that the dimensionless amplitude of the kink mode is small and use it as an expansion parameter in the regular perturbation method. We obtain the expression for the tube boundary perturbation in the second-order approximation. This perturbation is a superposition of sausage and fluting perturbations. |
| doi_str_mv | 10.1007/s11207-022-02054-w |
| format | Article |
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| subjects | Approximation Astrophysics and Astroparticles Atmospheric Sciences Dependent variables Equilibrium Fluid flow Grooving Independent variables Magnetic fields Magnetohydrodynamics Mathematical analysis Perturbation methods Physics Physics and Astronomy Plasma Solar physics Space Exploration and Astronautics Space Sciences (including Extraterrestrial Physics |
| title | Nonlinear Generation of Fluting Perturbations by Kink Mode in a Twisted Magnetic Tube |
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