Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..442s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 442-453. Research supported by Cornell University.
Astronomy and Astrophysics
Astrophysics
59
Energy Dissipation, Magnetohydrodynamic Waves, Solar Corona, Solar Magnetic Field, Wave Packets, Coronal Loops, Energy Conservation, Energy Transfer, Larmor Radius
Scientific paper
The importance of field line geometry for shear Alfven wave dissipation in coronal arches is demonstrated. An eikonal formulation makes it possible to account for the complicated magnetic geometry typical in coronal loops. An interpretation of Alfven wave resonance is given in terms of gradient steepening, and dissipation efficiencies are studied for two configurations: the well-known slab model with a straight magnetic field, and a new model with stochastic field lines. It is shown that a large fraction of the Alfven wave energy flux can be effectively dissipated in the corona.
Similon Philippe L.
Sudan R. N.
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