Coronal loop heating by discrete Alfvén waves |
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| Authors: | C A De Azevedo A S De Assis H Shigueoka P H Sakanaka |
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| Institution: | (1) Instituto de Física, Universidade do Estado do Rio de Janeiro, 20550 Rio de Janeiro, RJ, Brazil;(2) Instituto de Matemática, Universidade Federal Fluminense, 24024 Niterói, RJ, Brazil;(3) Instituto de Física, Universidade Federal Fluminense, 24024 Niterói, RJ, Brazil;(4) Instituto de Física, Universidade Estadual de Campinas, 13081 Campinas, SP, Brazil |
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| Abstract: | We have modeled the solar coronal active loop heating by discrete Alfvén waves. Discrete Alfvén waves (DAW) are a new class of Alfvén waves which can be described by the two-fluid model with finite ion-cyclotron frequency, or the MHD model with plasma current along the magnetic field line as shown by Appert, Vaclavik, and Villar (1984). We have modeled the coronal loop as a semi-toroidal plasma with the major toroidal radius much larger than the plasma radius. We have shown that the absorption of discrete Alfvén waves by the plasma through viscosity can account for at least 30% of the coronal heating rate density of 10–4 J m–3 s–1. |
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