The effect of twisted magnetic annulus on the period ratio $P_1/P_2$ of kink MHD waves

Details The effect of twisted magnetic annulus on the period ratio $P_1/P_2$ of kink MHD waves The effect of twisted magnetic annulus on the period ratio $P_1/P_2$ of kink MHD waves

2009-11-24

arxiv.org/abs/0911.4664v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

10 pages, 4 figures

Scientific paper

The standing kink magnetohydrodynamic (MHD) modes in a zero-beta cylindrical compressible magnetic flux tube modelled as a twisted core surrounded by a magnetically twisted annulus, both embedded in a straight ambient external field is considered. The dispersion relation is derived and solved numerically to obtain the frequencies of the kink MHD waves. The main result is that the twisted magnetic annulus does affect the period ratio $P_1/P_2$ of the kink modes.

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