|Title||Leaky and resonantly damped flux tube modes reconsidered|
|Publication Type||Journal Article|
|Year of Publication||1999|
|Authors||H. Stenuit, W.J Tirry, R. Keppens, M. Goossens|
|Journal||Astronomy & Astrophysics|
In this research note the results for the eigenfrequencies of the uniform and non-uniform magnetic flux tubes of Stenuit et al. (1998) are reconsidered. In that paper it is shown that the eigenfrequencies may have a damping rate due to two mechanisms causing a loss of energy. In non-uniform flux tubes the eigenmodes can be damped by resonant absorption. The other mechanism is leakage of wave energy into the surroundings, which can occur for both uniform and non-uniform flux tubes. We point out that the dispersion relations obtained by Stenuit et al. are correct for leaky and undamped non-leaky modes, but are not correct for resonantly damped non-leaky modes.
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