Axisymmetric absorption of p modes by an ensemble of thin, magnetic-flux tubes

Details Axisymmetric absorption of p modes by an ensemble of thin, magnetic-flux tubes Axisymmetric absorption of p modes by an ensemble of thin, magnetic-flux tubes

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jphcs.271a2016j&link_type=abstract

Journal of Physics: Conference Series, Volume 271, Issue 1, pp. 012016 (2011).

Physics

Scientific paper

The buffeting action of the solar acoustic waves (p modes) on magnetic fibrils excites magnetohydrodynamic (MHD) tube waves. We model these fibrils as axisymmetric, untwisted, vertically oriented, thin, magnetic-flux tubes. The MHD tube waves propagate along the length of the tube and carry energy away from the p-mode cavity creating a source of p-mode absorption. We calculate the absorption arising from the excitation of sausage MHD waves within a model plage composed of many flux tubes with differing plasma properties. We find that for a collection of tubes with normally distributed plasma parameters β, the macroscopic absorption coefficient of the collection effectively depends on only the mean value of β.

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