Excitation and damping of disturbances in cylindrical coronal loops.

Philos Trans A Math Phys Eng Sci

Departament de Física, Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain.

Published: February 2006

The excitation and damping of transversal coronal loop oscillations is studied using one-and two-dimensional models of line-tied cylindrical loops. By solving the time-dependent magnetohydrodynamic equations it is shown how an initial disturbance generated in the solar corona induces kink mode oscillations. We investigate the effect of the disturbance on a loop with a non-uniform boundary layer. In particular, a strong damping of transversal oscillations due to resonant absorption is found, such as predicted by previous works based on normal mode analysis.

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http://dx.doi.org/10.1098/rsta.2005.1718DOI Listing

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