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Title:
Resonances of coronal loops
Authors:
Hollweg, J. V.
Affiliation:
AA(New Hampshire, University, Durham, NH)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. 392-403. Research supported by the Science and Engineering Research Council of England. (ApJ Homepage)
Publication Date:
02/1984
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Coronal Loops, Energy Transfer, Magnetohydrodynamic Waves, Plasma Resonance, Solar Corona, Cavity Resonators, Energy Dissipation, Flux Density, Kelvin-Helmholtz Instability, Kolmogoroff Theory
DOI:
10.1086/161706
Bibliographic Code:
1984ApJ...277..392H

Abstract

It is pointed out that any theoretical demonstration that the solar corona can be heated by waves requires a demonstration that the required energies can actually be carried from the convection zone to the corona by waves. In addition, it must be shown that the waves can dissipate their energy into heat in the corona. The present investigation is concerned specifically with the heating of closed magnetic structures in the corona, taking into account coronal loops or active region loops. Attention is given to the MHD Alfven wave. It is shown analytically that coronal active region loops can behave much like interference filters. The coronal part of the loop acts like a resonant cavity for Alfven waves. When the resonances are excited, large energy fluxes can be carried into the loop by Alfven waves which are generated in the solar convection zone. It is estimated that the energy fluxes can power the observed loops.

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