Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.381...97k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 381, Issue 1, pp. 97-102.
Astronomy and Astrophysics
Astronomy
8
Sun: Corona, Sun: Magnetic Fields, Sun: Oscillations
Scientific paper
The standing magnetohydrodynamic (MHD) quasi-linear modes in a zero-β cylindrical magnetic flux tube that undergoes a longitudinal density stratification and radial density structuring are considered. The radial structuring is assumed to have a step-like density profile. The dispersion relation for the fast MHD body waves is derived and solved numerically to obtain the frequencies of the fundamental, first-overtone and second-overtone k = 1, 2, 3 modes of both kink (m = 1) and fluting (m = 2) waves, where k and m are the longitudinal and azimuthal mode numbers, respectively. Damping rates due to both viscous and resistive dissipations in the presence of the density stratification are derived and solved numerically for the first three modes of both kink and fluting waves.
Asvar A.
Karami Kayoomars
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