Topological constraints on solar loop plasma instabilities and Alfvén waves

作者: Luiz Garcia de Andrade

DOI: 10.2478/S11534-008-0088-Z

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摘要: Inhomogeneous plasmas-solar instabilities-are investigated by using the techniques of classical differential geometry for curves, where Frenet torsion and curvature describe completely motion a curve. In our case, frame changes in time also depends upon other coordinates, taking into account inhomogeneity plasma. The exponential perturbation method, so commonly used to cosmological perturbations, is applied magnetohydrodynamic (MHD) plasma equations find modes describing Alfven wave propagation medium planar loops. Stability imaginary axis spectra complex frequencies ω, i.e. \( \Im \) m (ω) ≠ 0. A pratical guide experimental solar physicists given computing twist force-free loops, which generalizes Parker formula relating torsion. expression loops on abnormality normal vector frame.

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