Leaky and non-leaky oscillations in magnetic flux tubes

Details Leaky and non-leaky oscillations in magnetic flux tubes Leaky and non-leaky oscillations in magnetic flux tubes

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..103..277c&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 103, no. 2, 1986, p. 277-298.

Physics

100

Solar Atmosphere, Solar Magnetic Field, Solar Oscillations, Eigenvalues, H Alpha Line, Photosphere, Wave Propagation

Scientific paper

An extensive analyis, both analytic and numerical, of waves in flux tubes imbedded in (possibly) magnetic surroundings is given. It is shown that any wave confined to the tube and its neighbourhood can be put into one of seven categories. Simple criteria for deciding the existence of each typ in any particular case are derived. Many other (leaky) modes are found which excite waves in the external medium and thereby lose energy to the surroundings. A number of asymptotic analyses allow much information to be gained about these without the need for numerical solution of the complicated equations involved. Three particular cases, pertaining to photospheric flux tubes, Hα fibrils, and coronal loops, are considered in detail.

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